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<div class="title">muxing.c</div> </div>
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<a href="muxing_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2003 Fabrice Bellard</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining a copy</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * of this software and associated documentation files (the "Software"), to deal</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * in the Software without restriction, including without limitation the rights</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * copies of the Software, and to permit persons to whom the Software is</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * furnished to do so, subject to the following conditions:</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * The above copyright notice and this permission notice shall be included in</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * all copies or substantial portions of the Software.</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * THE SOFTWARE.</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"></span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * @file</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * libavformat API example.</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * Output a media file in any supported libavformat format. The default</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * codecs are used.</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * @example muxing.c</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <stdlib.h></span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <string.h></span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include <math.h></span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include <<a class="code" href="avassert_8h.html">libavutil/avassert.h</a>></span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#include <<a class="code" href="channel__layout_8h.html">libavutil/channel_layout.h</a>></span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#include <<a class="code" href="opt_8h.html">libavutil/opt.h</a>></span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#include <<a class="code" href="mathematics_8h.html">libavutil/mathematics.h</a>></span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include <<a class="code" href="timestamp_8h.html">libavutil/timestamp.h</a>></span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#include <<a class="code" href="avformat_8h.html">libavformat/avformat.h</a>></span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#include <<a class="code" href="swscale_8h.html">libswscale/swscale.h</a>></span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#include <<a class="code" href="swresample_8h.html">libswresample/swresample.h</a>></span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div>
<div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="muxing_8c.html#ace0cad5fe744009aeaa62eb1fbb31831"> 46</a></span> <span class="preprocessor">#define STREAM_DURATION 10.0</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"><a class="line" href="muxing_8c.html#ad0fa7a6ac51a4021276c0a04dfe2283b"> 47</a></span> <span class="preprocessor"></span><span class="preprocessor">#define STREAM_FRAME_RATE 25 </span><span class="comment">/* 25 images/s */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="muxing_8c.html#ae67b157ab0198fa81bf675b378ff06fd"> 48</a></span> <span class="preprocessor"></span><span class="preprocessor">#define STREAM_PIX_FMT AV_PIX_FMT_YUV420P </span><span class="comment">/* default pix_fmt */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="muxing_8c.html#ab746bcb79e75e498c4925ccd72a34f63"> 50</a></span> <span class="preprocessor">#define SCALE_FLAGS SWS_BICUBIC</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment">// a wrapper around a single output AVStream</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="structOutputStream.html"> 53</a></span> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structOutputStream.html">OutputStream</a> {</div>
<div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088"> 54</a></span>  <a class="code" href="structAVStream.html">AVStream</a> *<a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">/* pts of the next frame that will be generated */</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="structOutputStream.html#aaa3b9001e4dac709017237c1c177cd0a"> 57</a></span>  int64_t <a class="code" href="structOutputStream.html#aaa3b9001e4dac709017237c1c177cd0a">next_pts</a>;</div>
<div class="line"><a name="l00058"></a><span class="lineno"><a class="line" href="structOutputStream.html#a0c3b9816e5c50c0ed816343d224121e7"> 58</a></span>  <span class="keywordtype">int</span> <a class="code" href="structOutputStream.html#a0c3b9816e5c50c0ed816343d224121e7">samples_count</a>;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> </div>
<div class="line"><a name="l00060"></a><span class="lineno"><a class="line" href="structOutputStream.html#a09ee2998f47d0e69c99dee8a6f71105a"> 60</a></span>  <a class="code" href="structAVFrame.html">AVFrame</a> *<a class="code" href="structOutputStream.html#a09ee2998f47d0e69c99dee8a6f71105a">frame</a>;</div>
<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="structOutputStream.html#a2ffa8b8369d869e8a440c2611ba91ae2"> 61</a></span>  <a class="code" href="structAVFrame.html">AVFrame</a> *<a class="code" href="structOutputStream.html#a2ffa8b8369d869e8a440c2611ba91ae2">tmp_frame</a>;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div>
<div class="line"><a name="l00063"></a><span class="lineno"><a class="line" href="structOutputStream.html#a04fe3fc54e1a382047e501c4ce63497b"> 63</a></span>  <span class="keywordtype">float</span> <a class="code" href="structOutputStream.html#ab5bc1d10f171e32c5241ab23271ae765">t</a>, <a class="code" href="structOutputStream.html#afacbd1335db05b68d2ea528c8b5d197b">tincr</a>, <a class="code" href="structOutputStream.html#a04fe3fc54e1a382047e501c4ce63497b">tincr2</a>;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div>
<div class="line"><a name="l00065"></a><span class="lineno"><a class="line" href="structOutputStream.html#a87e6c2172dab3143e4857aaaf6558573"> 65</a></span>  <span class="keyword">struct </span>SwsContext *<a class="code" href="structOutputStream.html#a87e6c2172dab3143e4857aaaf6558573">sws_ctx</a>;</div>
<div class="line"><a name="l00066"></a><span class="lineno"><a class="line" href="structOutputStream.html#a1a5c19db8f6a49a4d7a14168e4b73ec1"> 66</a></span>  <span class="keyword">struct </span><a class="code" href="group__lswr.html#ga4aa775b7fba31d2c8dc14c7b7e282863">SwrContext</a> *<a class="code" href="structOutputStream.html#a1a5c19db8f6a49a4d7a14168e4b73ec1">swr_ctx</a>;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> } <a class="code" href="structOutputStream.html">OutputStream</a>;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div>
<div class="line"><a name="l00069"></a><span class="lineno"><a class="line" href="muxing_8c.html#ac7a1319852323152629ce60c4ef04ed5"> 69</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="muxing_8c.html#ac7a1319852323152629ce60c4ef04ed5">log_packet</a>(<span class="keyword">const</span> <a class="code" href="structAVFormatContext.html">AVFormatContext</a> *<a class="code" href="demuxing__decoding_8c.html#a409462acdf7aebe5bfbe1bcd811efa5d">fmt_ctx</a>, <span class="keyword">const</span> <a class="code" href="structAVPacket.html">AVPacket</a> *<a class="code" href="demuxing__decoding_8c.html#a3d4c6562f0b27cf0cacbbea5c038c090">pkt</a>)</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> {</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <a class="code" href="structAVRational.html">AVRational</a> *time_base = &fmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[pkt-><a class="code" href="structAVPacket.html#a0d1cb9b5a32b00fb6edc81ea3aae2a49">stream_index</a>]-><a class="code" href="structAVStream.html#a9db755451f14e2bf590d4b85d82b32e6">time_base</a>;</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  printf(<span class="stringliteral">"pts:%s pts_time:%s dts:%s dts_time:%s duration:%s duration_time:%s stream_index:%d\n"</span>,</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <a class="code" href="timestamp_8h.html#a86d797e907fa454ed5fd34bfb0bcd747">av_ts2str</a>(pkt-><a class="code" href="structAVPacket.html#a73bde0a37f3b1efc839f11295bfbf42a">pts</a>), <a class="code" href="timestamp_8h.html#ad344b91ede6b86fc0a530611293f42da">av_ts2timestr</a>(pkt-><a class="code" href="structAVPacket.html#a73bde0a37f3b1efc839f11295bfbf42a">pts</a>, time_base),</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <a class="code" href="timestamp_8h.html#a86d797e907fa454ed5fd34bfb0bcd747">av_ts2str</a>(pkt-><a class="code" href="structAVPacket.html#a85dbbd306b44b02390cd91c45e6a0f76">dts</a>), <a class="code" href="timestamp_8h.html#ad344b91ede6b86fc0a530611293f42da">av_ts2timestr</a>(pkt-><a class="code" href="structAVPacket.html#a85dbbd306b44b02390cd91c45e6a0f76">dts</a>, time_base),</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <a class="code" href="timestamp_8h.html#a86d797e907fa454ed5fd34bfb0bcd747">av_ts2str</a>(pkt-><a class="code" href="structAVPacket.html#a622e758be29fd500aed0ffdc069550f7">duration</a>), <a class="code" href="timestamp_8h.html#ad344b91ede6b86fc0a530611293f42da">av_ts2timestr</a>(pkt-><a class="code" href="structAVPacket.html#a622e758be29fd500aed0ffdc069550f7">duration</a>, time_base),</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  pkt-><a class="code" href="structAVPacket.html#a0d1cb9b5a32b00fb6edc81ea3aae2a49">stream_index</a>);</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> }</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div>
<div class="line"><a name="l00080"></a><span class="lineno"><a class="line" href="muxing_8c.html#ab85f450fd9ee7aad777fc135b62dd3cd"> 80</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="muxing_8c.html#ab85f450fd9ee7aad777fc135b62dd3cd">write_frame</a>(<a class="code" href="structAVFormatContext.html">AVFormatContext</a> *<a class="code" href="demuxing__decoding_8c.html#a409462acdf7aebe5bfbe1bcd811efa5d">fmt_ctx</a>, <span class="keyword">const</span> <a class="code" href="structAVRational.html">AVRational</a> *time_base, <a class="code" href="structAVStream.html">AVStream</a> *st, <a class="code" href="structAVPacket.html">AVPacket</a> *<a class="code" href="demuxing__decoding_8c.html#a3d4c6562f0b27cf0cacbbea5c038c090">pkt</a>)</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> {</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="comment">/* rescale output packet timestamp values from codec to stream timebase */</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <a class="code" href="group__lavc__packet.html#gae5c86e4d93f6e7aa62ef2c60763ea67e">av_packet_rescale_ts</a>(pkt, *time_base, st-><a class="code" href="structAVStream.html#a9db755451f14e2bf590d4b85d82b32e6">time_base</a>);</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  pkt-><a class="code" href="structAVPacket.html#a0d1cb9b5a32b00fb6edc81ea3aae2a49">stream_index</a> = st-><a class="code" href="structAVStream.html#a6ca823054632821e085377f7d371a2d1">index</a>;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> </div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="comment">/* Write the compressed frame to the media file. */</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <a class="code" href="muxing_8c.html#ac7a1319852323152629ce60c4ef04ed5">log_packet</a>(fmt_ctx, pkt);</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavf__encoding.html#ga37352ed2c63493c38219d935e71db6c1">av_interleaved_write_frame</a>(fmt_ctx, pkt);</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> }</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment">/* Add an output stream. */</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"><a class="line" href="muxing_8c.html#aead090f3b6525cfdfa572f18f7575219"> 92</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="muxing_8c.html#aead090f3b6525cfdfa572f18f7575219">add_stream</a>(<a class="code" href="structOutputStream.html">OutputStream</a> *ost, <a class="code" href="structAVFormatContext.html">AVFormatContext</a> *oc,</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <a class="code" href="structAVCodec.html">AVCodec</a> **codec,</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">enum</span> <a class="code" href="group__lavc__core.html#gaadca229ad2c20e060a14fec08a5cc7ce">AVCodecID</a> codec_id)</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> {</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *c;</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordtype">int</span> i;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> </div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="comment">/* find the encoder */</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  *codec = <a class="code" href="group__lavc__encoding.html#ga9f820c481615c3a02d0407bac0bdbf25">avcodec_find_encoder</a>(codec_id);</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">if</span> (!(*codec)) {</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  fprintf(stderr, <span class="stringliteral">"Could not find encoder for '%s'\n"</span>,</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <a class="code" href="group__lavc__misc.html#ga2016a52e94f867ebe5113bdf448e182d">avcodec_get_name</a>(codec_id));</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  exit(1);</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  }</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a> = <a class="code" href="group__lavf__core.html#gadcb0fd3e507d9b58fe78f61f8ad39827">avformat_new_stream</a>(oc, *codec);</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">if</span> (!ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>) {</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate stream\n"</span>);</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  exit(1);</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  }</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>-><a class="code" href="structAVStream.html#a6873ed62f196c24e8bf282609231786f">id</a> = oc-><a class="code" href="structAVFormatContext.html#a0b748d924898b08b89ff4974afd17285">nb_streams</a>-1;</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  c = ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordflow">switch</span> ((*codec)->type) {</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordflow">case</span> <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a7b4e33b8f30ac94d34ce8d9f7c33927a">AVMEDIA_TYPE_AUDIO</a>:</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  c-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a> = (*codec)->sample_fmts ?</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  (*codec)->sample_fmts[0] : <a class="code" href="group__lavu__sampfmts.html#ggaf9a51ca15301871723577c730b5865c5a2d21c520e4ab21100b6440ec2d81ba1b">AV_SAMPLE_FMT_FLTP</a>;</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  c-><a class="code" href="structAVCodecContext.html#a6b53fda85ad61baa345edbd96cb8a33c">bit_rate</a> = 64000;</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a> = 44100;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">if</span> ((*codec)->supported_samplerates) {</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a> = (*codec)->supported_samplerates[0];</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">for</span> (i = 0; (*codec)->supported_samplerates[i]; i++) {</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">if</span> ((*codec)->supported_samplerates[i] == 44100)</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a> = 44100;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  }</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  }</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  c-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a> = <a class="code" href="group__channel__mask__c.html#gac95619abeb32e4a3daa18e3ff3419380">av_get_channel_layout_nb_channels</a>(c-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a>);</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  c-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a> = <a class="code" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>;</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordflow">if</span> ((*codec)->channel_layouts) {</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  c-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a> = (*codec)->channel_layouts[0];</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordflow">for</span> (i = 0; (*codec)->channel_layouts[i]; i++) {</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">if</span> ((*codec)->channel_layouts[i] == <a class="code" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>)</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  c-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a> = <a class="code" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>;</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  }</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  }</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  c-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a> = <a class="code" href="group__channel__mask__c.html#gac95619abeb32e4a3daa18e3ff3419380">av_get_channel_layout_nb_channels</a>(c-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a>);</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>-><a class="code" href="structAVStream.html#a9db755451f14e2bf590d4b85d82b32e6">time_base</a> = (<a class="code" href="structAVRational.html">AVRational</a>){ 1, c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a> };</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">case</span> <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5">AVMEDIA_TYPE_VIDEO</a>:</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  c-><a class="code" href="structAVCodecContext.html#adc5f65d6099fd8339c1580c091777223">codec_id</a> = codec_id;</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> </div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  c-><a class="code" href="structAVCodecContext.html#a6b53fda85ad61baa345edbd96cb8a33c">bit_rate</a> = 400000;</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="comment">/* Resolution must be a multiple of two. */</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  c-><a class="code" href="structAVCodecContext.html#a0d8f46461754e8abea0847dcbc41b956">width</a> = 352;</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  c-><a class="code" href="structAVCodecContext.html#a0449afd803eb107bd4dbc8b5ea22e363">height</a> = 288;</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="comment">/* timebase: This is the fundamental unit of time (in seconds) in terms</span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment"> * of which frame timestamps are represented. For fixed-fps content,</span></div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="comment"> * timebase should be 1/framerate and timestamp increments should be</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment"> * identical to 1. */</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>-><a class="code" href="structAVStream.html#a9db755451f14e2bf590d4b85d82b32e6">time_base</a> = (<a class="code" href="structAVRational.html">AVRational</a>){ 1, <a class="code" href="muxing_8c.html#ad0fa7a6ac51a4021276c0a04dfe2283b">STREAM_FRAME_RATE</a> };</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  c-><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a> = ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>-><a class="code" href="structAVStream.html#a9db755451f14e2bf590d4b85d82b32e6">time_base</a>;</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> </div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  c-><a class="code" href="structAVCodecContext.html#a9b6b3f1fcbdcc2ad9f4dbb4370496e38">gop_size</a> = 12; <span class="comment">/* emit one intra frame every twelve frames at most */</span></div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  c-><a class="code" href="structAVCodecContext.html#a0425c77b3d06d71e5db88b1d7e1b37f2">pix_fmt</a> = <a class="code" href="muxing_8c.html#ae67b157ab0198fa81bf675b378ff06fd">STREAM_PIX_FMT</a>;</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordflow">if</span> (c-><a class="code" href="structAVCodecContext.html#adc5f65d6099fd8339c1580c091777223">codec_id</a> == <a class="code" href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7ceaf614abb36f7c5d0c42ed522c1d6c99f0">AV_CODEC_ID_MPEG2VIDEO</a>) {</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="comment">/* just for testing, we also add B frames */</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  c-><a class="code" href="structAVCodecContext.html#a3e5334a611a3e2a6a653805bb9e2d4d4">max_b_frames</a> = 2;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  }</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordflow">if</span> (c-><a class="code" href="structAVCodecContext.html#adc5f65d6099fd8339c1580c091777223">codec_id</a> == <a class="code" href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7ceaf019b13f4891b36ae579cd7bc96d1f78">AV_CODEC_ID_MPEG1VIDEO</a>) {</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="comment">/* Needed to avoid using macroblocks in which some coeffs overflow.</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="comment"> * This does not happen with normal video, it just happens here as</span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="comment"> * the motion of the chroma plane does not match the luma plane. */</span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  c-><a class="code" href="structAVCodecContext.html#a66af0e26734255f1eacabd7d67558482">mb_decision</a> = 2;</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  }</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  }</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> </div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="comment">/* Some formats want stream headers to be separate. */</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordflow">if</span> (oc-><a class="code" href="structAVFormatContext.html#a20d80ac07e38ff5c268d15aaf2798b98">oformat</a>-><a class="code" href="structAVOutputFormat.html#aad55a00e728a020c1dcfaaf695320445">flags</a> & <a class="code" href="avformat_8h.html#ab203c7b734e9c31b7c37d34f6e2c6aef">AVFMT_GLOBALHEADER</a>)</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  c-><a class="code" href="structAVCodecContext.html#abb01e291550fa3fb96188af4d494587e">flags</a> |= <a class="code" href="group__lavc__core.html#ga9ed82634c59b339786575827c47a8f68">AV_CODEC_FLAG_GLOBAL_HEADER</a>;</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> }</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> </div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="comment">/**************************************************************/</span></div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="comment">/* audio output */</span></div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> </div>
<div class="line"><a name="l00181"></a><span class="lineno"><a class="line" href="muxing_8c.html#a368b2deb0a63160293db69808acfeff2"> 181</a></span> <span class="keyword">static</span> <a class="code" href="structAVFrame.html">AVFrame</a> *<a class="code" href="muxing_8c.html#a368b2deb0a63160293db69808acfeff2">alloc_audio_frame</a>(<span class="keyword">enum</span> <a class="code" href="group__lavu__sampfmts.html#gaf9a51ca15301871723577c730b5865c5">AVSampleFormat</a> sample_fmt,</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  uint64_t channel_layout,</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keywordtype">int</span> sample_rate, <span class="keywordtype">int</span> nb_samples)</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> {</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <a class="code" href="structAVFrame.html">AVFrame</a> *<a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a> = <a class="code" href="group__lavu__frame.html#gac700017c5270c79c1e1befdeeb008b2f">av_frame_alloc</a>();</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> </div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keywordflow">if</span> (!frame) {</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  fprintf(stderr, <span class="stringliteral">"Error allocating an audio frame\n"</span>);</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  exit(1);</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  }</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> </div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  frame-><a class="code" href="structAVFrame.html#aed14fa772ce46881020fd1545c86432c">format</a> = sample_fmt;</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  frame-><a class="code" href="structAVFrame.html#a5f343e0325e3e9d9ed20e34c9e156aef">channel_layout</a> = channel_layout;</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  frame-><a class="code" href="structAVFrame.html#ac85daa1316e1f47e78da0ca19b7c60e6">sample_rate</a> = sample_rate;</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  frame-><a class="code" href="structAVFrame.html#a02f45ab8191aea1660159f1e464237ea">nb_samples</a> = nb_samples;</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> </div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">if</span> (nb_samples) {</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  ret = <a class="code" href="group__lavu__frame.html#ga6b1acbfa82c79bf7fd78d868572f0ceb">av_frame_get_buffer</a>(frame, 0);</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  fprintf(stderr, <span class="stringliteral">"Error allocating an audio buffer\n"</span>);</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  exit(1);</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  }</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  }</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span> </div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keywordflow">return</span> <a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>;</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> }</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span> </div>
<div class="line"><a name="l00209"></a><span class="lineno"><a class="line" href="muxing_8c.html#ae7697b74a6a8605a91487b43e31f29be"> 209</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="muxing_8c.html#ae7697b74a6a8605a91487b43e31f29be">open_audio</a>(<a class="code" href="structAVFormatContext.html">AVFormatContext</a> *oc, <a class="code" href="structAVCodec.html">AVCodec</a> *codec, <a class="code" href="structOutputStream.html">OutputStream</a> *ost, <a class="code" href="group__lavu__dict.html#ga1d7cc0833bee918994a600556410315f">AVDictionary</a> *opt_arg)</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span> {</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *c;</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordtype">int</span> nb_samples;</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <a class="code" href="group__lavu__dict.html#ga1d7cc0833bee918994a600556410315f">AVDictionary</a> *opt = NULL;</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span> </div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  c = ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>;</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> </div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="comment">/* open it */</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <a class="code" href="group__lavu__dict.html#ga59a6372b124b306e3a2233723c5cdc78">av_dict_copy</a>(&opt, opt_arg, 0);</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  ret = <a class="code" href="group__lavc__core.html#ga11f785a188d7d9df71621001465b0f1d">avcodec_open2</a>(c, codec, &opt);</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <a class="code" href="group__lavu__dict.html#ga1bafd682b1fbb90e48a4cc3814b820f7">av_dict_free</a>(&opt);</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  fprintf(stderr, <span class="stringliteral">"Could not open audio codec: %s\n"</span>, <a class="code" href="group__lavu__error.html#gac4f6e109c242c81aeee21868d3f35e12">av_err2str</a>(ret));</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  exit(1);</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  }</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> </div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="comment">/* init signal generator */</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  ost-><a class="code" href="structOutputStream.html#ab5bc1d10f171e32c5241ab23271ae765">t</a> = 0;</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  ost-><a class="code" href="structOutputStream.html#afacbd1335db05b68d2ea528c8b5d197b">tincr</a> = 2 * <a class="code" href="mathematics_8h.html#ae71449b1cc6e6250b91f539153a7a0d3">M_PI</a> * 110.0 / c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>;</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="comment">/* increment frequency by 110 Hz per second */</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  ost-><a class="code" href="structOutputStream.html#a04fe3fc54e1a382047e501c4ce63497b">tincr2</a> = 2 * <a class="code" href="mathematics_8h.html#ae71449b1cc6e6250b91f539153a7a0d3">M_PI</a> * 110.0 / c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a> / c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>;</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> </div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordflow">if</span> (c-><a class="code" href="structAVCodecContext.html#a6e606effa68724cae2ef5cc05f7fd9cb">codec</a>-><a class="code" href="structAVCodec.html#af51f7ff3dac8b730f46b9713e49a2518">capabilities</a> & <a class="code" href="group__lavc__core.html#ga38b16ee9a8fd4c57ffd4fef0db3481c6">AV_CODEC_CAP_VARIABLE_FRAME_SIZE</a>)</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  nb_samples = 10000;</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  nb_samples = c-><a class="code" href="structAVCodecContext.html#aec57f0d859a6df8b479cd93ca3a44a33">frame_size</a>;</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> </div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  ost-><a class="code" href="structOutputStream.html#a09ee2998f47d0e69c99dee8a6f71105a">frame</a> = <a class="code" href="muxing_8c.html#a368b2deb0a63160293db69808acfeff2">alloc_audio_frame</a>(c-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>, c-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a>,</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>, nb_samples);</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  ost-><a class="code" href="structOutputStream.html#a2ffa8b8369d869e8a440c2611ba91ae2">tmp_frame</a> = <a class="code" href="muxing_8c.html#a368b2deb0a63160293db69808acfeff2">alloc_audio_frame</a>(<a class="code" href="group__lavu__sampfmts.html#ggaf9a51ca15301871723577c730b5865c5aea6132df57aebc3f76e10665395c46af">AV_SAMPLE_FMT_S16</a>, c-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a>,</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>, nb_samples);</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> </div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="comment">/* create resampler context */</span></div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  ost-><a class="code" href="structOutputStream.html#a1a5c19db8f6a49a4d7a14168e4b73ec1">swr_ctx</a> = <a class="code" href="group__lswr.html#gaf58c4ff10f73d74bdab8e5aa7193147c">swr_alloc</a>();</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordflow">if</span> (!ost-><a class="code" href="structOutputStream.html#a1a5c19db8f6a49a4d7a14168e4b73ec1">swr_ctx</a>) {</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate resampler context\n"</span>);</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  exit(1);</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  }</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> </div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="comment">/* set options */</span></div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <a class="code" href="group__opt__set__funcs.html#ga3adf7185c21cc080890a5ec02c2e56b2">av_opt_set_int</a> (ost-><a class="code" href="structOutputStream.html#a1a5c19db8f6a49a4d7a14168e4b73ec1">swr_ctx</a>, <span class="stringliteral">"in_channel_count"</span>, c-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a>, 0);</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <a class="code" href="group__opt__set__funcs.html#ga3adf7185c21cc080890a5ec02c2e56b2">av_opt_set_int</a> (ost-><a class="code" href="structOutputStream.html#a1a5c19db8f6a49a4d7a14168e4b73ec1">swr_ctx</a>, <span class="stringliteral">"in_sample_rate"</span>, c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>, 0);</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <a class="code" href="group__opt__set__funcs.html#gad446f7a7b92442e464d43e400e661040">av_opt_set_sample_fmt</a>(ost-><a class="code" href="structOutputStream.html#a1a5c19db8f6a49a4d7a14168e4b73ec1">swr_ctx</a>, <span class="stringliteral">"in_sample_fmt"</span>, <a class="code" href="group__lavu__sampfmts.html#ggaf9a51ca15301871723577c730b5865c5aea6132df57aebc3f76e10665395c46af">AV_SAMPLE_FMT_S16</a>, 0);</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <a class="code" href="group__opt__set__funcs.html#ga3adf7185c21cc080890a5ec02c2e56b2">av_opt_set_int</a> (ost-><a class="code" href="structOutputStream.html#a1a5c19db8f6a49a4d7a14168e4b73ec1">swr_ctx</a>, <span class="stringliteral">"out_channel_count"</span>, c-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a>, 0);</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <a class="code" href="group__opt__set__funcs.html#ga3adf7185c21cc080890a5ec02c2e56b2">av_opt_set_int</a> (ost-><a class="code" href="structOutputStream.html#a1a5c19db8f6a49a4d7a14168e4b73ec1">swr_ctx</a>, <span class="stringliteral">"out_sample_rate"</span>, c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>, 0);</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <a class="code" href="group__opt__set__funcs.html#gad446f7a7b92442e464d43e400e661040">av_opt_set_sample_fmt</a>(ost-><a class="code" href="structOutputStream.html#a1a5c19db8f6a49a4d7a14168e4b73ec1">swr_ctx</a>, <span class="stringliteral">"out_sample_fmt"</span>, c-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>, 0);</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> </div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="comment">/* initialize the resampling context */</span></div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordflow">if</span> ((ret = <a class="code" href="group__lswr.html#gae173e8ed91717700471a1dcd06f00f67">swr_init</a>(ost-><a class="code" href="structOutputStream.html#a1a5c19db8f6a49a4d7a14168e4b73ec1">swr_ctx</a>)) < 0) {</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  fprintf(stderr, <span class="stringliteral">"Failed to initialize the resampling context\n"</span>);</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  exit(1);</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  }</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> }</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> </div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="comment">/* Prepare a 16 bit dummy audio frame of 'frame_size' samples and</span></div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="comment"> * 'nb_channels' channels. */</span></div>
<div class="line"><a name="l00267"></a><span class="lineno"><a class="line" href="muxing_8c.html#a58000b15271c25fa9b2839d82f6971dc"> 267</a></span> <span class="keyword">static</span> <a class="code" href="structAVFrame.html">AVFrame</a> *<a class="code" href="muxing_8c.html#a58000b15271c25fa9b2839d82f6971dc">get_audio_frame</a>(<a class="code" href="structOutputStream.html">OutputStream</a> *ost)</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> {</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <a class="code" href="structAVFrame.html">AVFrame</a> *<a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a> = ost-><a class="code" href="structOutputStream.html#a2ffa8b8369d869e8a440c2611ba91ae2">tmp_frame</a>;</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordtype">int</span> j, i, v;</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  int16_t *q = (int16_t*)frame-><a class="code" href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">data</a>[0];</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> </div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="comment">/* check if we want to generate more frames */</span></div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  if (<a class="code" href="group__lavu__math.html#ga151744358fff630942b926e67e67c415">av_compare_ts</a>(ost-><a class="code" href="structOutputStream.html#aaa3b9001e4dac709017237c1c177cd0a">next_pts</a>, ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>-><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a>,</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <a class="code" href="muxing_8c.html#ace0cad5fe744009aeaa62eb1fbb31831">STREAM_DURATION</a>, (<a class="code" href="structAVRational.html">AVRational</a>){ 1, 1 }) >= 0)</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> </div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keywordflow">for</span> (j = 0; j <<a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>-><a class="code" href="structAVFrame.html#a02f45ab8191aea1660159f1e464237ea">nb_samples</a>; j++) {</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  v = (int)(sin(ost->t) * 10000);</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keywordflow">for</span> (i = 0; i < ost->st->codec->channels; i++)</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  *q++ = v;</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  ost->t += ost->tincr;</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  ost->tincr += ost->tincr2;</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  }</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> </div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>-><a class="code" href="structAVFrame.html#a0452833e3ab6ddd7acbf82817a7818a4">pts</a> = ost->next_pts;</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  ost->next_pts += <a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>-><a class="code" href="structAVFrame.html#a02f45ab8191aea1660159f1e464237ea">nb_samples</a>;</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> </div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="keywordflow">return</span> <a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>;</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span> }</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span> </div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="comment"> * encode one audio frame and send it to the muxer</span></div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> <span class="comment"> * return 1 when encoding is finished, 0 otherwise</span></div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"><a class="line" href="muxing_8c.html#a789f35413429ab70610c90c22fc7a4d3"> 296</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="muxing_8c.html#a789f35413429ab70610c90c22fc7a4d3">write_audio_frame</a>(<a class="code" href="structAVFormatContext.html">AVFormatContext</a> *oc, <a class="code" href="structOutputStream.html">OutputStream</a> *ost)</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> {</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *c;</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <a class="code" href="structAVPacket.html">AVPacket</a> <a class="code" href="demuxing__decoding_8c.html#a3d4c6562f0b27cf0cacbbea5c038c090">pkt</a> = { 0 }; <span class="comment">// data and size must be 0;</span></div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <a class="code" href="structAVFrame.html">AVFrame</a> *<a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>;</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keywordtype">int</span> got_packet;</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keywordtype">int</span> dst_nb_samples;</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span> </div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <a class="code" href="group__lavc__packet.html#gac9cb9756175b96e7441575803757fb73">av_init_packet</a>(&pkt);</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  c = ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>;</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span> </div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  frame = <a class="code" href="muxing_8c.html#a58000b15271c25fa9b2839d82f6971dc">get_audio_frame</a>(ost);</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> </div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">if</span> (frame) {</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="comment">/* convert samples from native format to destination codec format, using the resampler */</span></div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="comment">/* compute destination number of samples */</span></div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  dst_nb_samples = <a class="code" href="group__lavu__math.html#gad686ab94939ed4c65218309e94bdca72">av_rescale_rnd</a>(<a class="code" href="group__lswr.html#ga5121a5a7890a2d23b72dc871dd0ebb06">swr_get_delay</a>(ost-><a class="code" href="structOutputStream.html#a1a5c19db8f6a49a4d7a14168e4b73ec1">swr_ctx</a>, c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>) + frame-><a class="code" href="structAVFrame.html#a02f45ab8191aea1660159f1e464237ea">nb_samples</a>,</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>, c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>, <a class="code" href="group__lavu__math.html#gga921d656eaf2c4d6800a734a13af021d0aa1d28e08e2f8b49b256e056f93038c1a">AV_ROUND_UP</a>);</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <a class="code" href="avassert_8h.html#aae204192396f78cc8c5cd7ad5c57c23f">av_assert0</a>(dst_nb_samples == frame-><a class="code" href="structAVFrame.html#a02f45ab8191aea1660159f1e464237ea">nb_samples</a>);</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> </div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="comment">/* when we pass a frame to the encoder, it may keep a reference to it</span></div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <span class="comment"> * internally;</span></div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> <span class="comment"> * make sure we do not overwrite it here</span></div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  ret = <a class="code" href="group__lavu__frame.html#gadd5417c06f5a6b419b0dbd8f0ff363fd">av_frame_make_writable</a>(ost-><a class="code" href="structOutputStream.html#a09ee2998f47d0e69c99dee8a6f71105a">frame</a>);</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="keywordflow">if</span> (ret < 0)</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  exit(1);</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span> </div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="comment">/* convert to destination format */</span></div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  ret = <a class="code" href="group__lswr.html#gaa5bb6cab830146efa8c760fa66ee582a">swr_convert</a>(ost-><a class="code" href="structOutputStream.html#a1a5c19db8f6a49a4d7a14168e4b73ec1">swr_ctx</a>,</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  ost-><a class="code" href="structOutputStream.html#a09ee2998f47d0e69c99dee8a6f71105a">frame</a>-><a class="code" href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">data</a>, dst_nb_samples,</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  (<span class="keyword">const</span> uint8_t **)frame-><a class="code" href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">data</a>, frame-><a class="code" href="structAVFrame.html#a02f45ab8191aea1660159f1e464237ea">nb_samples</a>);</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  fprintf(stderr, <span class="stringliteral">"Error while converting\n"</span>);</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  exit(1);</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  }</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  frame = ost-><a class="code" href="structOutputStream.html#a09ee2998f47d0e69c99dee8a6f71105a">frame</a>;</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span> </div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  frame-><a class="code" href="structAVFrame.html#a0452833e3ab6ddd7acbf82817a7818a4">pts</a> = <a class="code" href="group__lavu__math.html#gaf02994a8bbeaa91d4757df179cbe567f">av_rescale_q</a>(ost-><a class="code" href="structOutputStream.html#a0c3b9816e5c50c0ed816343d224121e7">samples_count</a>, (<a class="code" href="structAVRational.html">AVRational</a>){1, c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>}, c-><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a>);</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  ost-><a class="code" href="structOutputStream.html#a0c3b9816e5c50c0ed816343d224121e7">samples_count</a> += dst_nb_samples;</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  }</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> </div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  ret = <a class="code" href="group__lavc__encoding.html#ga93a49fbd0973b216dcb8a8c5dffe1d82">avcodec_encode_audio2</a>(c, &<a class="code" href="demuxing__decoding_8c.html#a3d4c6562f0b27cf0cacbbea5c038c090">pkt</a>, <a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>, &got_packet);</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  fprintf(stderr, <span class="stringliteral">"Error encoding audio frame: %s\n"</span>, <a class="code" href="group__lavu__error.html#gac4f6e109c242c81aeee21868d3f35e12">av_err2str</a>(ret));</div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  exit(1);</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  }</div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span> </div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keywordflow">if</span> (got_packet) {</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  ret = <a class="code" href="muxing_8c.html#ab85f450fd9ee7aad777fc135b62dd3cd">write_frame</a>(oc, &c->time_base, ost->st, &<a class="code" href="demuxing__decoding_8c.html#a3d4c6562f0b27cf0cacbbea5c038c090">pkt</a>);</div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  fprintf(stderr, <span class="stringliteral">"Error while writing audio frame: %s\n"</span>,</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <a class="code" href="group__lavu__error.html#gac4f6e109c242c81aeee21868d3f35e12">av_err2str</a>(ret));</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  exit(1);</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  }</div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  }</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span> </div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <span class="keywordflow">return</span> (<a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a> || got_packet) ? 0 : 1;</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span> }</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span> </div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="comment">/**************************************************************/</span></div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span> <span class="comment">/* video output */</span></div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span> </div>
<div class="line"><a name="l00360"></a><span class="lineno"><a class="line" href="muxing_8c.html#a03824343735e44b58ec03ff1691f8b45"> 360</a></span> <span class="keyword">static</span> <a class="code" href="structAVFrame.html">AVFrame</a> *<a class="code" href="muxing_8c.html#a03824343735e44b58ec03ff1691f8b45">alloc_picture</a>(<span class="keyword">enum</span> <a class="code" href="pixfmt_8h.html#a9a8e335cf3be472042bc9f0cf80cd4c5">AVPixelFormat</a> <a class="code" href="demuxing__decoding_8c.html#a7331e302ea7bb48e0b605a069576e135">pix_fmt</a>, <span class="keywordtype">int</span> <a class="code" href="demuxing__decoding_8c.html#a2474a5474cbff19523a51eb1de01cda4">width</a>, <span class="keywordtype">int</span> <a class="code" href="demuxing__decoding_8c.html#ad12fc34ce789bce6c8a05d8a17138534">height</a>)</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span> {</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <a class="code" href="structAVFrame.html">AVFrame</a> *picture;</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <span class="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span> </div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  picture = <a class="code" href="group__lavu__frame.html#gac700017c5270c79c1e1befdeeb008b2f">av_frame_alloc</a>();</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="keywordflow">if</span> (!picture)</div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span> </div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  picture-><a class="code" href="structAVFrame.html#aed14fa772ce46881020fd1545c86432c">format</a> = <a class="code" href="demuxing__decoding_8c.html#a7331e302ea7bb48e0b605a069576e135">pix_fmt</a>;</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  picture-><a class="code" href="structAVFrame.html#a1e71ce60cedd5f3b6811714a9f7f9e0a">width</a> = <a class="code" href="demuxing__decoding_8c.html#a2474a5474cbff19523a51eb1de01cda4">width</a>;</div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  picture-><a class="code" href="structAVFrame.html#a3f89733f429c98ba5bc64373fb0a3f13">height</a> = <a class="code" href="demuxing__decoding_8c.html#ad12fc34ce789bce6c8a05d8a17138534">height</a>;</div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span> </div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <span class="comment">/* allocate the buffers for the frame data */</span></div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  ret = <a class="code" href="group__lavu__frame.html#ga6b1acbfa82c79bf7fd78d868572f0ceb">av_frame_get_buffer</a>(picture, 32);</div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate frame data.\n"</span>);</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  exit(1);</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  }</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span> </div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <span class="keywordflow">return</span> picture;</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span> }</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span> </div>
<div class="line"><a name="l00383"></a><span class="lineno"><a class="line" href="muxing_8c.html#a34f7b1a6fc3698c190131c3df2e85903"> 383</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="muxing_8c.html#a34f7b1a6fc3698c190131c3df2e85903">open_video</a>(<a class="code" href="structAVFormatContext.html">AVFormatContext</a> *oc, <a class="code" href="structAVCodec.html">AVCodec</a> *codec, <a class="code" href="structOutputStream.html">OutputStream</a> *ost, <a class="code" href="group__lavu__dict.html#ga1d7cc0833bee918994a600556410315f">AVDictionary</a> *opt_arg)</div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span> {</div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *c = ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>;</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  <a class="code" href="group__lavu__dict.html#ga1d7cc0833bee918994a600556410315f">AVDictionary</a> *opt = NULL;</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span> </div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  <a class="code" href="group__lavu__dict.html#ga59a6372b124b306e3a2233723c5cdc78">av_dict_copy</a>(&opt, opt_arg, 0);</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span> </div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <span class="comment">/* open the codec */</span></div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  ret = <a class="code" href="group__lavc__core.html#ga11f785a188d7d9df71621001465b0f1d">avcodec_open2</a>(c, codec, &opt);</div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <a class="code" href="group__lavu__dict.html#ga1bafd682b1fbb90e48a4cc3814b820f7">av_dict_free</a>(&opt);</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  fprintf(stderr, <span class="stringliteral">"Could not open video codec: %s\n"</span>, <a class="code" href="group__lavu__error.html#gac4f6e109c242c81aeee21868d3f35e12">av_err2str</a>(ret));</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  exit(1);</div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  }</div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span> </div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="comment">/* allocate and init a re-usable frame */</span></div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  ost-><a class="code" href="structOutputStream.html#a09ee2998f47d0e69c99dee8a6f71105a">frame</a> = <a class="code" href="muxing_8c.html#a03824343735e44b58ec03ff1691f8b45">alloc_picture</a>(c-><a class="code" href="structAVCodecContext.html#a0425c77b3d06d71e5db88b1d7e1b37f2">pix_fmt</a>, c-><a class="code" href="structAVCodecContext.html#a0d8f46461754e8abea0847dcbc41b956">width</a>, c-><a class="code" href="structAVCodecContext.html#a0449afd803eb107bd4dbc8b5ea22e363">height</a>);</div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  <span class="keywordflow">if</span> (!ost-><a class="code" href="structOutputStream.html#a09ee2998f47d0e69c99dee8a6f71105a">frame</a>) {</div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate video frame\n"</span>);</div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  exit(1);</div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  }</div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span> </div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  <span class="comment">/* If the output format is not YUV420P, then a temporary YUV420P</span></div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span> <span class="comment"> * picture is needed too. It is then converted to the required</span></div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span> <span class="comment"> * output format. */</span></div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  ost-><a class="code" href="structOutputStream.html#a2ffa8b8369d869e8a440c2611ba91ae2">tmp_frame</a> = NULL;</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  <span class="keywordflow">if</span> (c-><a class="code" href="structAVCodecContext.html#a0425c77b3d06d71e5db88b1d7e1b37f2">pix_fmt</a> != <a class="code" href="pixfmt_8h.html#a9a8e335cf3be472042bc9f0cf80cd4c5a1aa7677092740d8def31655b5d7f0cc2">AV_PIX_FMT_YUV420P</a>) {</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  ost-><a class="code" href="structOutputStream.html#a2ffa8b8369d869e8a440c2611ba91ae2">tmp_frame</a> = <a class="code" href="muxing_8c.html#a03824343735e44b58ec03ff1691f8b45">alloc_picture</a>(<a class="code" href="pixfmt_8h.html#a9a8e335cf3be472042bc9f0cf80cd4c5a1aa7677092740d8def31655b5d7f0cc2">AV_PIX_FMT_YUV420P</a>, c-><a class="code" href="structAVCodecContext.html#a0d8f46461754e8abea0847dcbc41b956">width</a>, c-><a class="code" href="structAVCodecContext.html#a0449afd803eb107bd4dbc8b5ea22e363">height</a>);</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="keywordflow">if</span> (!ost-><a class="code" href="structOutputStream.html#a2ffa8b8369d869e8a440c2611ba91ae2">tmp_frame</a>) {</div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate temporary picture\n"</span>);</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  exit(1);</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  }</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  }</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span> }</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span> </div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span> <span class="comment">/* Prepare a dummy image. */</span></div>
<div class="line"><a name="l00420"></a><span class="lineno"><a class="line" href="muxing_8c.html#acc346658c36a422fc9ab42bbb976138e"> 420</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="muxing_8c.html#acc346658c36a422fc9ab42bbb976138e">fill_yuv_image</a>(<a class="code" href="structAVFrame.html">AVFrame</a> *pict, <span class="keywordtype">int</span> frame_index,</div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <span class="keywordtype">int</span> <a class="code" href="demuxing__decoding_8c.html#a2474a5474cbff19523a51eb1de01cda4">width</a>, <span class="keywordtype">int</span> <a class="code" href="demuxing__decoding_8c.html#ad12fc34ce789bce6c8a05d8a17138534">height</a>)</div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span> {</div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keywordtype">int</span> x, y, i, ret;</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span> </div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  <span class="comment">/* when we pass a frame to the encoder, it may keep a reference to it</span></div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span> <span class="comment"> * internally;</span></div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span> <span class="comment"> * make sure we do not overwrite it here</span></div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  ret = <a class="code" href="group__lavu__frame.html#gadd5417c06f5a6b419b0dbd8f0ff363fd">av_frame_make_writable</a>(pict);</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <span class="keywordflow">if</span> (ret < 0)</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  exit(1);</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span> </div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  i = frame_index;</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span> </div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <span class="comment">/* Y */</span></div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  <span class="keywordflow">for</span> (y = 0; y < <a class="code" href="demuxing__decoding_8c.html#ad12fc34ce789bce6c8a05d8a17138534">height</a>; y++)</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  <span class="keywordflow">for</span> (x = 0; x < <a class="code" href="demuxing__decoding_8c.html#a2474a5474cbff19523a51eb1de01cda4">width</a>; x++)</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  pict-><a class="code" href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">data</a>[0][y * pict-><a class="code" href="structAVFrame.html#aa52bfc6605f6a3059a0c3226cc0f6567">linesize</a>[0] + x] = x + y + i * 3;</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span> </div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  <span class="comment">/* Cb and Cr */</span></div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  for (y = 0; y < height / 2; y++) {</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <span class="keywordflow">for</span> (x = 0; x < width / 2; x++) {</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  pict-><a class="code" href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">data</a>[1][y * pict-><a class="code" href="structAVFrame.html#aa52bfc6605f6a3059a0c3226cc0f6567">linesize</a>[1] + x] = 128 + y + i * 2;</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  pict-><a class="code" href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">data</a>[2][y * pict-><a class="code" href="structAVFrame.html#aa52bfc6605f6a3059a0c3226cc0f6567">linesize</a>[2] + x] = 64 + x + i * 5;</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  }</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  }</div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span> }</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span> </div>
<div class="line"><a name="l00449"></a><span class="lineno"><a class="line" href="muxing_8c.html#a2a1515bfcdc1e221407cba978bcad1f0"> 449</a></span> <span class="keyword">static</span> <a class="code" href="structAVFrame.html">AVFrame</a> *<a class="code" href="muxing_8c.html#a2a1515bfcdc1e221407cba978bcad1f0">get_video_frame</a>(<a class="code" href="structOutputStream.html">OutputStream</a> *ost)</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span> {</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *c = ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>;</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span> </div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  <span class="comment">/* check if we want to generate more frames */</span></div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  <span class="keywordflow">if</span> (<a class="code" href="group__lavu__math.html#ga151744358fff630942b926e67e67c415">av_compare_ts</a>(ost-><a class="code" href="structOutputStream.html#aaa3b9001e4dac709017237c1c177cd0a">next_pts</a>, ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>-><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a>,</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  <a class="code" href="muxing_8c.html#ace0cad5fe744009aeaa62eb1fbb31831">STREAM_DURATION</a>, (<a class="code" href="structAVRational.html">AVRational</a>){ 1, 1 }) >= 0)</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span> </div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  <span class="keywordflow">if</span> (c->pix_fmt != <a class="code" href="pixfmt_8h.html#a9a8e335cf3be472042bc9f0cf80cd4c5a1aa7677092740d8def31655b5d7f0cc2">AV_PIX_FMT_YUV420P</a>) {</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  <span class="comment">/* as we only generate a YUV420P picture, we must convert it</span></div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span> <span class="comment"> * to the codec pixel format if needed */</span></div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <span class="keywordflow">if</span> (!ost->sws_ctx) {</div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  ost->sws_ctx = <a class="code" href="group__libsws.html#gaf360d1a9e0e60f906f74d7d44f9abfdd">sws_getContext</a>(c->width, c->height,</div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  <a class="code" href="pixfmt_8h.html#a9a8e335cf3be472042bc9f0cf80cd4c5a1aa7677092740d8def31655b5d7f0cc2">AV_PIX_FMT_YUV420P</a>,</div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  c->width, c->height,</div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  c->pix_fmt,</div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <a class="code" href="muxing_8c.html#ab746bcb79e75e498c4925ccd72a34f63">SCALE_FLAGS</a>, NULL, NULL, NULL);</div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="keywordflow">if</span> (!ost->sws_ctx) {</div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  fprintf(stderr,</div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  <span class="stringliteral">"Could not initialize the conversion context\n"</span>);</div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  exit(1);</div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  }</div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  }</div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  <a class="code" href="muxing_8c.html#acc346658c36a422fc9ab42bbb976138e">fill_yuv_image</a>(ost->tmp_frame, ost->next_pts, c->width, c->height);</div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  <a class="code" href="group__libsws.html#gae531c9754c9205d90ad6800015046d74">sws_scale</a>(ost->sws_ctx,</div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  (<span class="keyword">const</span> uint8_t * <span class="keyword">const</span> *)ost->tmp_frame->data, ost->tmp_frame->linesize,</div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  0, c->height, ost->frame->data, ost->frame->linesize);</div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  <a class="code" href="muxing_8c.html#acc346658c36a422fc9ab42bbb976138e">fill_yuv_image</a>(ost->frame, ost->next_pts, c->width, c->height);</div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  }</div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span> </div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  ost->frame->pts = ost->next_pts++;</div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span> </div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  <span class="keywordflow">return</span> ost->frame;</div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span> }</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span> </div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span> <span class="comment"> * encode one video frame and send it to the muxer</span></div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span> <span class="comment"> * return 1 when encoding is finished, 0 otherwise</span></div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00490"></a><span class="lineno"><a class="line" href="muxing_8c.html#a435288caae5076cca3273215cb6ad395"> 490</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="muxing_8c.html#a435288caae5076cca3273215cb6ad395">write_video_frame</a>(<a class="code" href="structAVFormatContext.html">AVFormatContext</a> *oc, <a class="code" href="structOutputStream.html">OutputStream</a> *ost)</div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span> {</div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  <span class="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *c;</div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  <a class="code" href="structAVFrame.html">AVFrame</a> *<a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>;</div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  <span class="keywordtype">int</span> got_packet = 0;</div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  <a class="code" href="structAVPacket.html">AVPacket</a> <a class="code" href="demuxing__decoding_8c.html#a3d4c6562f0b27cf0cacbbea5c038c090">pkt</a> = { 0 };</div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span> </div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  c = ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>;</div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span> </div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  frame = <a class="code" href="muxing_8c.html#a2a1515bfcdc1e221407cba978bcad1f0">get_video_frame</a>(ost);</div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span> </div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  <a class="code" href="group__lavc__packet.html#gac9cb9756175b96e7441575803757fb73">av_init_packet</a>(&pkt);</div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span> </div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  <span class="comment">/* encode the image */</span></div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  ret = <a class="code" href="group__lavc__encoding.html#gaa2dc9e9ea2567ebb2801a08153c7306b">avcodec_encode_video2</a>(c, &pkt, frame, &got_packet);</div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  fprintf(stderr, <span class="stringliteral">"Error encoding video frame: %s\n"</span>, <a class="code" href="group__lavu__error.html#gac4f6e109c242c81aeee21868d3f35e12">av_err2str</a>(ret));</div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  exit(1);</div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  }</div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span> </div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  <span class="keywordflow">if</span> (got_packet) {</div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  ret = <a class="code" href="muxing_8c.html#ab85f450fd9ee7aad777fc135b62dd3cd">write_frame</a>(oc, &c-><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a>, ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>, &pkt);</div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  ret = 0;</div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  }</div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span> </div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  fprintf(stderr, <span class="stringliteral">"Error while writing video frame: %s\n"</span>, <a class="code" href="group__lavu__error.html#gac4f6e109c242c81aeee21868d3f35e12">av_err2str</a>(ret));</div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  exit(1);</div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  }</div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span> </div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  <span class="keywordflow">return</span> (frame || got_packet) ? 0 : 1;</div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span> }</div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span> </div>
<div class="line"><a name="l00525"></a><span class="lineno"><a class="line" href="muxing_8c.html#a92d8b2751255677797d807161fae9d19"> 525</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="muxing_8c.html#a92d8b2751255677797d807161fae9d19">close_stream</a>(<a class="code" href="structAVFormatContext.html">AVFormatContext</a> *oc, <a class="code" href="structOutputStream.html">OutputStream</a> *ost)</div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span> {</div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  <a class="code" href="group__lavc__core.html#gaf4daa92361efb3523ef5afeb0b54077f">avcodec_close</a>(ost-><a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>);</div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&ost-><a class="code" href="structOutputStream.html#a09ee2998f47d0e69c99dee8a6f71105a">frame</a>);</div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&ost-><a class="code" href="structOutputStream.html#a2ffa8b8369d869e8a440c2611ba91ae2">tmp_frame</a>);</div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  <a class="code" href="group__libsws.html#gad3af0ca76f071dbe0173444db9882932">sws_freeContext</a>(ost-><a class="code" href="structOutputStream.html#a87e6c2172dab3143e4857aaaf6558573">sws_ctx</a>);</div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  <a class="code" href="group__lswr.html#ga818f7d78b1ad7d8d5b70de374b668c34">swr_free</a>(&ost-><a class="code" href="structOutputStream.html#a1a5c19db8f6a49a4d7a14168e4b73ec1">swr_ctx</a>);</div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span> }</div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span> </div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span> <span class="comment">/**************************************************************/</span></div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span> <span class="comment">/* media file output */</span></div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span> </div>
<div class="line"><a name="l00537"></a><span class="lineno"><a class="line" href="muxing_8c.html#a3c04138a5bfe5d72780bb7e82a18e627"> 537</a></span> <span class="keywordtype">int</span> <a class="code" href="muxing_8c.html#a3c04138a5bfe5d72780bb7e82a18e627">main</a>(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> **argv)</div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span> {</div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  <a class="code" href="structOutputStream.html">OutputStream</a> video_st = { 0 }, audio_st = { 0 };</div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *filename;</div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  <a class="code" href="structAVOutputFormat.html">AVOutputFormat</a> *fmt;</div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  <a class="code" href="structAVFormatContext.html">AVFormatContext</a> *oc;</div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  <a class="code" href="structAVCodec.html">AVCodec</a> *audio_codec, *video_codec;</div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <span class="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  <span class="keywordtype">int</span> have_video = 0, have_audio = 0;</div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  <span class="keywordtype">int</span> encode_video = 0, encode_audio = 0;</div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  <a class="code" href="group__lavu__dict.html#ga1d7cc0833bee918994a600556410315f">AVDictionary</a> *opt = NULL;</div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span> </div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  <span class="comment">/* Initialize libavcodec, and register all codecs and formats. */</span></div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  <a class="code" href="group__lavf__core.html#ga917265caec45ef5a0646356ed1a507e3">av_register_all</a>();</div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span> </div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  <span class="keywordflow">if</span> (argc < 2) {</div>
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  printf(<span class="stringliteral">"usage: %s output_file\n"</span></div>
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  <span class="stringliteral">"API example program to output a media file with libavformat.\n"</span></div>
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  <span class="stringliteral">"This program generates a synthetic audio and video stream, encodes and\n"</span></div>
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  <span class="stringliteral">"muxes them into a file named output_file.\n"</span></div>
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  <span class="stringliteral">"The output format is automatically guessed according to the file extension.\n"</span></div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  <span class="stringliteral">"Raw images can also be output by using '%%d' in the filename.\n"</span></div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  <span class="stringliteral">"\n"</span>, argv[0]);</div>
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  }</div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span> </div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  filename = argv[1];</div>
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  <span class="keywordflow">if</span> (argc > 3 && !strcmp(argv[2], <span class="stringliteral">"-flags"</span>)) {</div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  <a class="code" href="group__lavu__dict.html#ga8d9c2de72b310cef8e6a28c9cd3acbbe">av_dict_set</a>(&opt, argv[2]+1, argv[3], 0);</div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  }</div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span> </div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  <span class="comment">/* allocate the output media context */</span></div>
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  <a class="code" href="avformat_8h.html#a6ddf3d982feb45fa5081420ee911f5d5">avformat_alloc_output_context2</a>(&oc, NULL, NULL, filename);</div>
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  <span class="keywordflow">if</span> (!oc) {</div>
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span>  printf(<span class="stringliteral">"Could not deduce output format from file extension: using MPEG.\n"</span>);</div>
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  <a class="code" href="avformat_8h.html#a6ddf3d982feb45fa5081420ee911f5d5">avformat_alloc_output_context2</a>(&oc, NULL, <span class="stringliteral">"mpeg"</span>, filename);</div>
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  }</div>
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  <span class="keywordflow">if</span> (!oc)</div>
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span> </div>
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  fmt = oc-><a class="code" href="structAVFormatContext.html#a20d80ac07e38ff5c268d15aaf2798b98">oformat</a>;</div>
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span> </div>
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  <span class="comment">/* Add the audio and video streams using the default format codecs</span></div>
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span> <span class="comment"> * and initialize the codecs. */</span></div>
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  <span class="keywordflow">if</span> (fmt-><a class="code" href="structAVOutputFormat.html#a1354a9c8542b1b698157218336bd4754">video_codec</a> != <a class="code" href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7cea48761c50b102343e2648c3e28a94e7ab">AV_CODEC_ID_NONE</a>) {</div>
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  <a class="code" href="muxing_8c.html#aead090f3b6525cfdfa572f18f7575219">add_stream</a>(&video_st, oc, &video_codec, fmt-><a class="code" href="structAVOutputFormat.html#a1354a9c8542b1b698157218336bd4754">video_codec</a>);</div>
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  have_video = 1;</div>
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  encode_video = 1;</div>
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  }</div>
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  <span class="keywordflow">if</span> (fmt-><a class="code" href="structAVOutputFormat.html#a2e4fff0aa061984d586ea08ecad96141">audio_codec</a> != <a class="code" href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7cea48761c50b102343e2648c3e28a94e7ab">AV_CODEC_ID_NONE</a>) {</div>
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  <a class="code" href="muxing_8c.html#aead090f3b6525cfdfa572f18f7575219">add_stream</a>(&audio_st, oc, &audio_codec, fmt-><a class="code" href="structAVOutputFormat.html#a2e4fff0aa061984d586ea08ecad96141">audio_codec</a>);</div>
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  have_audio = 1;</div>
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  encode_audio = 1;</div>
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  }</div>
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span> </div>
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span>  <span class="comment">/* Now that all the parameters are set, we can open the audio and</span></div>
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span> <span class="comment"> * video codecs and allocate the necessary encode buffers. */</span></div>
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  <span class="keywordflow">if</span> (have_video)</div>
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  <a class="code" href="muxing_8c.html#a34f7b1a6fc3698c190131c3df2e85903">open_video</a>(oc, video_codec, &video_st, opt);</div>
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span> </div>
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  <span class="keywordflow">if</span> (have_audio)</div>
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  <a class="code" href="muxing_8c.html#ae7697b74a6a8605a91487b43e31f29be">open_audio</a>(oc, audio_codec, &audio_st, opt);</div>
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span> </div>
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  <a class="code" href="group__lavf__misc.html#gae2645941f2dc779c307eb6314fd39f10">av_dump_format</a>(oc, 0, filename, 1);</div>
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span> </div>
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  <span class="comment">/* open the output file, if needed */</span></div>
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  <span class="keywordflow">if</span> (!(fmt-><a class="code" href="structAVOutputFormat.html#aad55a00e728a020c1dcfaaf695320445">flags</a> & <a class="code" href="avformat_8h.html#a752cce390d480521919aa5d8be24ac0b">AVFMT_NOFILE</a>)) {</div>
<div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  ret = <a class="code" href="avio_8h.html#a371a670112abc5f3e15bc570da076301">avio_open</a>(&oc-><a class="code" href="structAVFormatContext.html#a1e7324262b6b78522e52064daaa7bc87">pb</a>, filename, <a class="code" href="avio_8h.html#a5c9308f296545a8f3b7687d277a6dabc">AVIO_FLAG_WRITE</a>);</div>
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  fprintf(stderr, <span class="stringliteral">"Could not open '%s': %s\n"</span>, filename,</div>
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  <a class="code" href="group__lavu__error.html#gac4f6e109c242c81aeee21868d3f35e12">av_err2str</a>(ret));</div>
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  }</div>
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  }</div>
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span> </div>
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  <span class="comment">/* Write the stream header, if any. */</span></div>
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  ret = <a class="code" href="group__lavf__encoding.html#ga18b7b10bb5b94c4842de18166bc677cb">avformat_write_header</a>(oc, &opt);</div>
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  fprintf(stderr, <span class="stringliteral">"Error occurred when opening output file: %s\n"</span>,</div>
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  <a class="code" href="group__lavu__error.html#gac4f6e109c242c81aeee21868d3f35e12">av_err2str</a>(ret));</div>
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  }</div>
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span> </div>
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  <span class="keywordflow">while</span> (encode_video || encode_audio) {</div>
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  <span class="comment">/* select the stream to encode */</span></div>
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  <span class="keywordflow">if</span> (encode_video &&</div>
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  (!encode_audio || <a class="code" href="group__lavu__math.html#ga151744358fff630942b926e67e67c415">av_compare_ts</a>(video_st.<a class="code" href="structOutputStream.html#aaa3b9001e4dac709017237c1c177cd0a">next_pts</a>, video_st.<a class="code" href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">st</a>-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>-><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a>,</div>
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  audio_st.next_pts, audio_st.st->codec->time_base) <= 0)) {</div>
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  encode_video = !<a class="code" href="muxing_8c.html#a435288caae5076cca3273215cb6ad395">write_video_frame</a>(oc, &video_st);</div>
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  encode_audio = !<a class="code" href="muxing_8c.html#a789f35413429ab70610c90c22fc7a4d3">write_audio_frame</a>(oc, &audio_st);</div>
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  }</div>
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  }</div>
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span> </div>
<div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  <span class="comment">/* Write the trailer, if any. The trailer must be written before you</span></div>
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span> <span class="comment"> * close the CodecContexts open when you wrote the header; otherwise</span></div>
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span> <span class="comment"> * av_write_trailer() may try to use memory that was freed on</span></div>
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span> <span class="comment"> * av_codec_close(). */</span></div>
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  <a class="code" href="group__lavf__encoding.html#ga7f14007e7dc8f481f054b21614dfec13">av_write_trailer</a>(oc);</div>
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span> </div>
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  <span class="comment">/* Close each codec. */</span></div>
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  <span class="keywordflow">if</span> (have_video)</div>
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  <a class="code" href="muxing_8c.html#a92d8b2751255677797d807161fae9d19">close_stream</a>(oc, &video_st);</div>
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  <span class="keywordflow">if</span> (have_audio)</div>
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  <a class="code" href="muxing_8c.html#a92d8b2751255677797d807161fae9d19">close_stream</a>(oc, &audio_st);</div>
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span> </div>
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  <span class="keywordflow">if</span> (!(fmt-><a class="code" href="structAVOutputFormat.html#aad55a00e728a020c1dcfaaf695320445">flags</a> & <a class="code" href="avformat_8h.html#a752cce390d480521919aa5d8be24ac0b">AVFMT_NOFILE</a>))</div>
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  <span class="comment">/* Close the output file. */</span></div>
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  <a class="code" href="avio_8h.html#ae118a1f37f1e48617609ead9910aac15">avio_closep</a>(&oc-><a class="code" href="structAVFormatContext.html#a1e7324262b6b78522e52064daaa7bc87">pb</a>);</div>
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span> </div>
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  <span class="comment">/* free the stream */</span></div>
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  <a class="code" href="group__lavf__core.html#gac2990b13b68e831a408fce8e1d0d6445">avformat_free_context</a>(oc);</div>
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span> </div>
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span> }</div>
<div class="ttc" id="avio_8h_html_a371a670112abc5f3e15bc570da076301"><div class="ttname"><a href="avio_8h.html#a371a670112abc5f3e15bc570da076301">avio_open</a></div><div class="ttdeci">int avio_open(AVIOContext **s, const char *url, int flags)</div><div class="ttdoc">Create and initialize a AVIOContext for accessing the resource indicated by url. </div></div>
<div class="ttc" id="structOutputStream_html_aaa3b9001e4dac709017237c1c177cd0a"><div class="ttname"><a href="structOutputStream.html#aaa3b9001e4dac709017237c1c177cd0a">OutputStream::next_pts</a></div><div class="ttdeci">int64_t next_pts</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00057">muxing.c:57</a></div></div>
<div class="ttc" id="group__lavu__sampfmts_html_ggaf9a51ca15301871723577c730b5865c5a2d21c520e4ab21100b6440ec2d81ba1b"><div class="ttname"><a href="group__lavu__sampfmts.html#ggaf9a51ca15301871723577c730b5865c5a2d21c520e4ab21100b6440ec2d81ba1b">AV_SAMPLE_FMT_FLTP</a></div><div class="ttdoc">float, planar </div><div class="ttdef"><b>Definition:</b> <a href="samplefmt_8h_source.html#l00070">samplefmt.h:70</a></div></div>
<div class="ttc" id="structAVCodecContext_html_a6e606effa68724cae2ef5cc05f7fd9cb"><div class="ttname"><a href="structAVCodecContext.html#a6e606effa68724cae2ef5cc05f7fd9cb">AVCodecContext::codec</a></div><div class="ttdeci">const struct AVCodec * codec</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01541">avcodec.h:1541</a></div></div>
<div class="ttc" id="group__lavc__core_html_ggaadca229ad2c20e060a14fec08a5cc7cea48761c50b102343e2648c3e28a94e7ab"><div class="ttname"><a href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7cea48761c50b102343e2648c3e28a94e7ab">AV_CODEC_ID_NONE</a></div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l00102">avcodec.h:102</a></div></div>
<div class="ttc" id="demuxing__decoding_8c_html_a7331e302ea7bb48e0b605a069576e135"><div class="ttname"><a href="demuxing__decoding_8c.html#a7331e302ea7bb48e0b605a069576e135">pix_fmt</a></div><div class="ttdeci">static enum AVPixelFormat pix_fmt</div><div class="ttdef"><b>Definition:</b> <a href="demuxing__decoding_8c_source.html#l00040">demuxing_decoding.c:40</a></div></div>
<div class="ttc" id="structAVFrame_html"><div class="ttname"><a href="structAVFrame.html">AVFrame</a></div><div class="ttdoc">This structure describes decoded (raw) audio or video data. </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00181">frame.h:181</a></div></div>
<div class="ttc" id="muxing_8c_html_a3c04138a5bfe5d72780bb7e82a18e627"><div class="ttname"><a href="muxing_8c.html#a3c04138a5bfe5d72780bb7e82a18e627">main</a></div><div class="ttdeci">int main(int argc, char **argv)</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00537">muxing.c:537</a></div></div>
<div class="ttc" id="group__lavc__encoding_html_ga9f820c481615c3a02d0407bac0bdbf25"><div class="ttname"><a href="group__lavc__encoding.html#ga9f820c481615c3a02d0407bac0bdbf25">avcodec_find_encoder</a></div><div class="ttdeci">AVCodec * avcodec_find_encoder(enum AVCodecID id)</div><div class="ttdoc">Find a registered encoder with a matching codec ID. </div></div>
<div class="ttc" id="group__lavf__encoding_html_ga37352ed2c63493c38219d935e71db6c1"><div class="ttname"><a href="group__lavf__encoding.html#ga37352ed2c63493c38219d935e71db6c1">av_interleaved_write_frame</a></div><div class="ttdeci">int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)</div><div class="ttdoc">Write a packet to an output media file ensuring correct interleaving. </div></div>
<div class="ttc" id="group__lavu__math_html_gad686ab94939ed4c65218309e94bdca72"><div class="ttname"><a href="group__lavu__math.html#gad686ab94939ed4c65218309e94bdca72">av_rescale_rnd</a></div><div class="ttdeci">int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding) av_const</div><div class="ttdoc">Rescale a 64-bit integer with specified rounding. </div></div>
<div class="ttc" id="structAVCodecContext_html_a6b53fda85ad61baa345edbd96cb8a33c"><div class="ttname"><a href="structAVCodecContext.html#a6b53fda85ad61baa345edbd96cb8a33c">AVCodecContext::bit_rate</a></div><div class="ttdeci">int64_t bit_rate</div><div class="ttdoc">the average bitrate </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01597">avcodec.h:1597</a></div></div>
<div class="ttc" id="structOutputStream_html_ac11510a2eeed3e6a14f0fbc85db2e088"><div class="ttname"><a href="structOutputStream.html#ac11510a2eeed3e6a14f0fbc85db2e088">OutputStream::st</a></div><div class="ttdeci">AVStream * st</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00054">muxing.c:54</a></div></div>
<div class="ttc" id="muxing_8c_html_a789f35413429ab70610c90c22fc7a4d3"><div class="ttname"><a href="muxing_8c.html#a789f35413429ab70610c90c22fc7a4d3">write_audio_frame</a></div><div class="ttdeci">static int write_audio_frame(AVFormatContext *oc, OutputStream *ost)</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00296">muxing.c:296</a></div></div>
<div class="ttc" id="structAVCodecContext_html_a3e5334a611a3e2a6a653805bb9e2d4d4"><div class="ttname"><a href="structAVCodecContext.html#a3e5334a611a3e2a6a653805bb9e2d4d4">AVCodecContext::max_b_frames</a></div><div class="ttdeci">int max_b_frames</div><div class="ttdoc">maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 re...</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01810">avcodec.h:1810</a></div></div>
<div class="ttc" id="structAVOutputFormat_html_a1354a9c8542b1b698157218336bd4754"><div class="ttname"><a href="structAVOutputFormat.html#a1354a9c8542b1b698157218336bd4754">AVOutputFormat::video_codec</a></div><div class="ttdeci">enum AVCodecID video_codec</div><div class="ttdoc">default video codec </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l00534">avformat.h:534</a></div></div>
<div class="ttc" id="demuxing__decoding_8c_html_a409462acdf7aebe5bfbe1bcd811efa5d"><div class="ttname"><a href="demuxing__decoding_8c.html#a409462acdf7aebe5bfbe1bcd811efa5d">fmt_ctx</a></div><div class="ttdeci">static AVFormatContext * fmt_ctx</div><div class="ttdef"><b>Definition:</b> <a href="demuxing__decoding_8c_source.html#l00037">demuxing_decoding.c:37</a></div></div>
<div class="ttc" id="structAVStream_html_a6ca823054632821e085377f7d371a2d1"><div class="ttname"><a href="structAVStream.html#a6ca823054632821e085377f7d371a2d1">AVStream::index</a></div><div class="ttdeci">int index</div><div class="ttdoc">stream index in AVFormatContext </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l00878">avformat.h:878</a></div></div>
<div class="ttc" id="structOutputStream_html_afacbd1335db05b68d2ea528c8b5d197b"><div class="ttname"><a href="structOutputStream.html#afacbd1335db05b68d2ea528c8b5d197b">OutputStream::tincr</a></div><div class="ttdeci">float tincr</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00063">muxing.c:63</a></div></div>
<div class="ttc" id="avio_8h_html_a5c9308f296545a8f3b7687d277a6dabc"><div class="ttname"><a href="avio_8h.html#a5c9308f296545a8f3b7687d277a6dabc">AVIO_FLAG_WRITE</a></div><div class="ttdeci">#define AVIO_FLAG_WRITE</div><div class="ttdoc">write-only </div><div class="ttdef"><b>Definition:</b> <a href="avio_8h_source.html#l00538">avio.h:538</a></div></div>
<div class="ttc" id="structAVCodecContext_html_a0425c77b3d06d71e5db88b1d7e1b37f2"><div class="ttname"><a href="structAVCodecContext.html#a0425c77b3d06d71e5db88b1d7e1b37f2">AVCodecContext::pix_fmt</a></div><div class="ttdeci">enum AVPixelFormat pix_fmt</div><div class="ttdoc">Pixel format, see AV_PIX_FMT_xxx. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01752">avcodec.h:1752</a></div></div>
<div class="ttc" id="group__lavu__dict_html_ga59a6372b124b306e3a2233723c5cdc78"><div class="ttname"><a href="group__lavu__dict.html#ga59a6372b124b306e3a2233723c5cdc78">av_dict_copy</a></div><div class="ttdeci">int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)</div><div class="ttdoc">Copy entries from one AVDictionary struct into another. </div></div>
<div class="ttc" id="demuxing__decoding_8c_html_a3d4c6562f0b27cf0cacbbea5c038c090"><div class="ttname"><a href="demuxing__decoding_8c.html#a3d4c6562f0b27cf0cacbbea5c038c090">pkt</a></div><div class="ttdeci">static AVPacket pkt</div><div class="ttdef"><b>Definition:</b> <a href="demuxing__decoding_8c_source.html#l00054">demuxing_decoding.c:54</a></div></div>
<div class="ttc" id="group__lavc__encoding_html_ga93a49fbd0973b216dcb8a8c5dffe1d82"><div class="ttname"><a href="group__lavc__encoding.html#ga93a49fbd0973b216dcb8a8c5dffe1d82">avcodec_encode_audio2</a></div><div class="ttdeci">int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)</div><div class="ttdoc">Encode a frame of audio. </div></div>
<div class="ttc" id="group__channel__mask__c_html_gabc6d6651bba254cd0fa2c42a57228e65"><div class="ttname"><a href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a></div><div class="ttdeci">#define AV_CH_LAYOUT_STEREO</div><div class="ttdef"><b>Definition:</b> <a href="channel__layout_8h_source.html#l00086">channel_layout.h:86</a></div></div>
<div class="ttc" id="muxing_8c_html_aead090f3b6525cfdfa572f18f7575219"><div class="ttname"><a href="muxing_8c.html#aead090f3b6525cfdfa572f18f7575219">add_stream</a></div><div class="ttdeci">static void add_stream(OutputStream *ost, AVFormatContext *oc, AVCodec **codec, enum AVCodecID codec_id)</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00092">muxing.c:92</a></div></div>
<div class="ttc" id="structAVCodec_html"><div class="ttname"><a href="structAVCodec.html">AVCodec</a></div><div class="ttdoc">AVCodec. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l03392">avcodec.h:3392</a></div></div>
<div class="ttc" id="muxing_8c_html_a34f7b1a6fc3698c190131c3df2e85903"><div class="ttname"><a href="muxing_8c.html#a34f7b1a6fc3698c190131c3df2e85903">open_video</a></div><div class="ttdeci">static void open_video(AVFormatContext *oc, AVCodec *codec, OutputStream *ost, AVDictionary *opt_arg)</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00383">muxing.c:383</a></div></div>
<div class="ttc" id="structAVCodecContext_html_ab7bfeb9fa5840aac090e2b0bd0ef7589"><div class="ttname"><a href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">AVCodecContext::time_base</a></div><div class="ttdeci">AVRational time_base</div><div class="ttdoc">This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01661">avcodec.h:1661</a></div></div>
<div class="ttc" id="muxing_8c_html_a92d8b2751255677797d807161fae9d19"><div class="ttname"><a href="muxing_8c.html#a92d8b2751255677797d807161fae9d19">close_stream</a></div><div class="ttdeci">static void close_stream(AVFormatContext *oc, OutputStream *ost)</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00525">muxing.c:525</a></div></div>
<div class="ttc" id="group__channel__mask__c_html_gac95619abeb32e4a3daa18e3ff3419380"><div class="ttname"><a href="group__channel__mask__c.html#gac95619abeb32e4a3daa18e3ff3419380">av_get_channel_layout_nb_channels</a></div><div class="ttdeci">int av_get_channel_layout_nb_channels(uint64_t channel_layout)</div><div class="ttdoc">Return the number of channels in the channel layout. </div></div>
<div class="ttc" id="structAVFormatContext_html"><div class="ttname"><a href="structAVFormatContext.html">AVFormatContext</a></div><div class="ttdoc">Format I/O context. </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l01314">avformat.h:1314</a></div></div>
<div class="ttc" id="mathematics_8h_html"><div class="ttname"><a href="mathematics_8h.html">mathematics.h</a></div></div>
<div class="ttc" id="muxing_8c_html_ab746bcb79e75e498c4925ccd72a34f63"><div class="ttname"><a href="muxing_8c.html#ab746bcb79e75e498c4925ccd72a34f63">SCALE_FLAGS</a></div><div class="ttdeci">#define SCALE_FLAGS</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00050">muxing.c:50</a></div></div>
<div class="ttc" id="avassert_8h_html_aae204192396f78cc8c5cd7ad5c57c23f"><div class="ttname"><a href="avassert_8h.html#aae204192396f78cc8c5cd7ad5c57c23f">av_assert0</a></div><div class="ttdeci">#define av_assert0(cond)</div><div class="ttdoc">assert() equivalent, that is always enabled. </div><div class="ttdef"><b>Definition:</b> <a href="avassert_8h_source.html#l00037">avassert.h:37</a></div></div>
<div class="ttc" id="structAVCodecContext_html_a1bdba69ea111e2a9d03fdaa7a46a4c45"><div class="ttname"><a href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">AVCodecContext::sample_fmt</a></div><div class="ttdeci">enum AVSampleFormat sample_fmt</div><div class="ttdoc">audio sample format </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l02295">avcodec.h:2295</a></div></div>
<div class="ttc" id="structAVOutputFormat_html_aad55a00e728a020c1dcfaaf695320445"><div class="ttname"><a href="structAVOutputFormat.html#aad55a00e728a020c1dcfaaf695320445">AVOutputFormat::flags</a></div><div class="ttdeci">int flags</div><div class="ttdoc">can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS, AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS, AVFMT_ALLOW_FLUSH, AVFMT_TS_NONSTRICT </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l00542">avformat.h:542</a></div></div>
<div class="ttc" id="group__lavu__math_html_gga921d656eaf2c4d6800a734a13af021d0aa1d28e08e2f8b49b256e056f93038c1a"><div class="ttname"><a href="group__lavu__math.html#gga921d656eaf2c4d6800a734a13af021d0aa1d28e08e2f8b49b256e056f93038c1a">AV_ROUND_UP</a></div><div class="ttdoc">Round toward +infinity. </div><div class="ttdef"><b>Definition:</b> <a href="mathematics_8h_source.html#l00074">mathematics.h:74</a></div></div>
<div class="ttc" id="group__lswr_html_gaf58c4ff10f73d74bdab8e5aa7193147c"><div class="ttname"><a href="group__lswr.html#gaf58c4ff10f73d74bdab8e5aa7193147c">swr_alloc</a></div><div class="ttdeci">struct SwrContext * swr_alloc(void)</div><div class="ttdoc">Allocate SwrContext. </div></div>
<div class="ttc" id="group__lavu__frame_html_gac700017c5270c79c1e1befdeeb008b2f"><div class="ttname"><a href="group__lavu__frame.html#gac700017c5270c79c1e1befdeeb008b2f">av_frame_alloc</a></div><div class="ttdeci">AVFrame * av_frame_alloc(void)</div><div class="ttdoc">Allocate an AVFrame and set its fields to default values. </div></div>
<div class="ttc" id="muxing_8c_html_ac7a1319852323152629ce60c4ef04ed5"><div class="ttname"><a href="muxing_8c.html#ac7a1319852323152629ce60c4ef04ed5">log_packet</a></div><div class="ttdeci">static void log_packet(const AVFormatContext *fmt_ctx, const AVPacket *pkt)</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00069">muxing.c:69</a></div></div>
<div class="ttc" id="opt_8h_html"><div class="ttname"><a href="opt_8h.html">opt.h</a></div><div class="ttdoc">AVOptions. </div></div>
<div class="ttc" id="timestamp_8h_html"><div class="ttname"><a href="timestamp_8h.html">timestamp.h</a></div><div class="ttdoc">timestamp utils, mostly useful for debugging/logging purposes </div></div>
<div class="ttc" id="structAVPacket_html_a622e758be29fd500aed0ffdc069550f7"><div class="ttname"><a href="structAVPacket.html#a622e758be29fd500aed0ffdc069550f7">AVPacket::duration</a></div><div class="ttdeci">int64_t duration</div><div class="ttdoc">Duration of this packet in AVStream->time_base units, 0 if unknown. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01485">avcodec.h:1485</a></div></div>
<div class="ttc" id="structAVStream_html_a6873ed62f196c24e8bf282609231786f"><div class="ttname"><a href="structAVStream.html#a6873ed62f196c24e8bf282609231786f">AVStream::id</a></div><div class="ttdeci">int id</div><div class="ttdoc">Format-specific stream ID. </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l00884">avformat.h:884</a></div></div>
<div class="ttc" id="structAVFrame_html_a0452833e3ab6ddd7acbf82817a7818a4"><div class="ttname"><a href="structAVFrame.html#a0452833e3ab6ddd7acbf82817a7818a4">AVFrame::pts</a></div><div class="ttdeci">int64_t pts</div><div class="ttdoc">Presentation timestamp in time_base units (time when frame should be shown to user). </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00262">frame.h:262</a></div></div>
<div class="ttc" id="group__lavf__core_html_gadcb0fd3e507d9b58fe78f61f8ad39827"><div class="ttname"><a href="group__lavf__core.html#gadcb0fd3e507d9b58fe78f61f8ad39827">avformat_new_stream</a></div><div class="ttdeci">AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)</div><div class="ttdoc">Add a new stream to a media file. </div></div>
<div class="ttc" id="structAVFormatContext_html_acfefb6b6cf21e87a0dcbd1a547ba2348"><div class="ttname"><a href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">AVFormatContext::streams</a></div><div class="ttdeci">AVStream ** streams</div><div class="ttdoc">A list of all streams in the file. </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l01382">avformat.h:1382</a></div></div>
<div class="ttc" id="group__lavc__encoding_html_gaa2dc9e9ea2567ebb2801a08153c7306b"><div class="ttname"><a href="group__lavc__encoding.html#gaa2dc9e9ea2567ebb2801a08153c7306b">avcodec_encode_video2</a></div><div class="ttdeci">int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)</div><div class="ttdoc">Encode a frame of video. </div></div>
<div class="ttc" id="demuxing__decoding_8c_html_ad7d33d579a8d4241a5e643e39287a209"><div class="ttname"><a href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a></div><div class="ttdeci">static AVFrame * frame</div><div class="ttdef"><b>Definition:</b> <a href="demuxing__decoding_8c_source.html#l00053">demuxing_decoding.c:53</a></div></div>
<div class="ttc" id="group__libsws_html_gaf360d1a9e0e60f906f74d7d44f9abfdd"><div class="ttname"><a href="group__libsws.html#gaf360d1a9e0e60f906f74d7d44f9abfdd">sws_getContext</a></div><div class="ttdeci">struct SwsContext * sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)</div><div class="ttdoc">Allocate and return an SwsContext. </div></div>
<div class="ttc" id="structOutputStream_html_a1a5c19db8f6a49a4d7a14168e4b73ec1"><div class="ttname"><a href="structOutputStream.html#a1a5c19db8f6a49a4d7a14168e4b73ec1">OutputStream::swr_ctx</a></div><div class="ttdeci">struct SwrContext * swr_ctx</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00066">muxing.c:66</a></div></div>
<div class="ttc" id="group__lswr_html_gaa5bb6cab830146efa8c760fa66ee582a"><div class="ttname"><a href="group__lswr.html#gaa5bb6cab830146efa8c760fa66ee582a">swr_convert</a></div><div class="ttdeci">int swr_convert(struct SwrContext *s, uint8_t **out, int out_count, const uint8_t **in, int in_count)</div><div class="ttdoc">Convert audio. </div></div>
<div class="ttc" id="swscale_8h_html"><div class="ttname"><a href="swscale_8h.html">swscale.h</a></div><div class="ttdoc">external API header </div></div>
<div class="ttc" id="structAVFormatContext_html_a20d80ac07e38ff5c268d15aaf2798b98"><div class="ttname"><a href="structAVFormatContext.html#a20d80ac07e38ff5c268d15aaf2798b98">AVFormatContext::oformat</a></div><div class="ttdeci">struct AVOutputFormat * oformat</div><div class="ttdoc">The output container format. </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l01333">avformat.h:1333</a></div></div>
<div class="ttc" id="avformat_8h_html_a6ddf3d982feb45fa5081420ee911f5d5"><div class="ttname"><a href="avformat_8h.html#a6ddf3d982feb45fa5081420ee911f5d5">avformat_alloc_output_context2</a></div><div class="ttdeci">int avformat_alloc_output_context2(AVFormatContext **ctx, AVOutputFormat *oformat, const char *format_name, const char *filename)</div><div class="ttdoc">Allocate an AVFormatContext for an output format. </div></div>
<div class="ttc" id="group__lavu__math_html_gaf02994a8bbeaa91d4757df179cbe567f"><div class="ttname"><a href="group__lavu__math.html#gaf02994a8bbeaa91d4757df179cbe567f">av_rescale_q</a></div><div class="ttdeci">int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq) av_const</div><div class="ttdoc">Rescale a 64-bit integer by 2 rational numbers. </div></div>
<div class="ttc" id="group__lavf__misc_html_gae2645941f2dc779c307eb6314fd39f10"><div class="ttname"><a href="group__lavf__misc.html#gae2645941f2dc779c307eb6314fd39f10">av_dump_format</a></div><div class="ttdeci">void av_dump_format(AVFormatContext *ic, int index, const char *url, int is_output)</div><div class="ttdoc">Print detailed information about the input or output format, such as duration, bitrate, streams, container, programs, metadata, side data, codec and time base. </div></div>
<div class="ttc" id="group__lavc__core_html_ggaadca229ad2c20e060a14fec08a5cc7ceaf019b13f4891b36ae579cd7bc96d1f78"><div class="ttname"><a href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7ceaf019b13f4891b36ae579cd7bc96d1f78">AV_CODEC_ID_MPEG1VIDEO</a></div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l00105">avcodec.h:105</a></div></div>
<div class="ttc" id="group__lavc__core_html_gaf4daa92361efb3523ef5afeb0b54077f"><div class="ttname"><a href="group__lavc__core.html#gaf4daa92361efb3523ef5afeb0b54077f">avcodec_close</a></div><div class="ttdeci">int avcodec_close(AVCodecContext *avctx)</div><div class="ttdoc">Close a given AVCodecContext and free all the data associated with it (but not the AVCodecContext its...</div></div>
<div class="ttc" id="swresample_8h_html"><div class="ttname"><a href="swresample_8h.html">swresample.h</a></div><div class="ttdoc">libswresample public header </div></div>
<div class="ttc" id="group__lavc__core_html_gaadca229ad2c20e060a14fec08a5cc7ce"><div class="ttname"><a href="group__lavc__core.html#gaadca229ad2c20e060a14fec08a5cc7ce">AVCodecID</a></div><div class="ttdeci">AVCodecID</div><div class="ttdoc">Identify the syntax and semantics of the bitstream. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l00101">avcodec.h:101</a></div></div>
<div class="ttc" id="structAVFrame_html_a1e71ce60cedd5f3b6811714a9f7f9e0a"><div class="ttname"><a href="structAVFrame.html#a1e71ce60cedd5f3b6811714a9f7f9e0a">AVFrame::width</a></div><div class="ttdeci">int width</div><div class="ttdoc">width and height of the video frame </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00230">frame.h:230</a></div></div>
<div class="ttc" id="group__lavc__packet_html_gae5c86e4d93f6e7aa62ef2c60763ea67e"><div class="ttname"><a href="group__lavc__packet.html#gae5c86e4d93f6e7aa62ef2c60763ea67e">av_packet_rescale_ts</a></div><div class="ttdeci">void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst)</div><div class="ttdoc">Convert valid timing fields (timestamps / durations) in a packet from one timebase to another...</div></div>
<div class="ttc" id="muxing_8c_html_a03824343735e44b58ec03ff1691f8b45"><div class="ttname"><a href="muxing_8c.html#a03824343735e44b58ec03ff1691f8b45">alloc_picture</a></div><div class="ttdeci">static AVFrame * alloc_picture(enum AVPixelFormat pix_fmt, int width, int height)</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00360">muxing.c:360</a></div></div>
<div class="ttc" id="group__lavu__frame_html_ga979d73f3228814aee56aeca0636e37cc"><div class="ttname"><a href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a></div><div class="ttdeci">void av_frame_free(AVFrame **frame)</div><div class="ttdoc">Free the frame and any dynamically allocated objects in it, e.g. </div></div>
<div class="ttc" id="timestamp_8h_html_ad344b91ede6b86fc0a530611293f42da"><div class="ttname"><a href="timestamp_8h.html#ad344b91ede6b86fc0a530611293f42da">av_ts2timestr</a></div><div class="ttdeci">#define av_ts2timestr(ts, tb)</div><div class="ttdoc">Convenience macro, the return value should be used only directly in function arguments but never stan...</div><div class="ttdef"><b>Definition:</b> <a href="timestamp_8h_source.html#l00076">timestamp.h:76</a></div></div>
<div class="ttc" id="structAVCodec_html_af51f7ff3dac8b730f46b9713e49a2518"><div class="ttname"><a href="structAVCodec.html#af51f7ff3dac8b730f46b9713e49a2518">AVCodec::capabilities</a></div><div class="ttdeci">int capabilities</div><div class="ttdoc">Codec capabilities. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l03411">avcodec.h:3411</a></div></div>
<div class="ttc" id="group__lavu__dict_html_ga1d7cc0833bee918994a600556410315f"><div class="ttname"><a href="group__lavu__dict.html#ga1d7cc0833bee918994a600556410315f">AVDictionary</a></div><div class="ttdeci">struct AVDictionary AVDictionary</div><div class="ttdef"><b>Definition:</b> <a href="dict_8h_source.html#l00091">dict.h:91</a></div></div>
<div class="ttc" id="group__lavu__dict_html_ga1bafd682b1fbb90e48a4cc3814b820f7"><div class="ttname"><a href="group__lavu__dict.html#ga1bafd682b1fbb90e48a4cc3814b820f7">av_dict_free</a></div><div class="ttdeci">void av_dict_free(AVDictionary **m)</div><div class="ttdoc">Free all the memory allocated for an AVDictionary struct and all keys and values. ...</div></div>
<div class="ttc" id="structAVCodecContext_html_abb01e291550fa3fb96188af4d494587e"><div class="ttname"><a href="structAVCodecContext.html#abb01e291550fa3fb96188af4d494587e">AVCodecContext::flags</a></div><div class="ttdeci">int flags</div><div class="ttdoc">AV_CODEC_FLAG_*. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01627">avcodec.h:1627</a></div></div>
<div class="ttc" id="group__opt__set__funcs_html_ga3adf7185c21cc080890a5ec02c2e56b2"><div class="ttname"><a href="group__opt__set__funcs.html#ga3adf7185c21cc080890a5ec02c2e56b2">av_opt_set_int</a></div><div class="ttdeci">int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)</div></div>
<div class="ttc" id="group__lavu__misc_html_gga9a84bba4713dfced21a1a56163be1f48a7b4e33b8f30ac94d34ce8d9f7c33927a"><div class="ttname"><a href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a7b4e33b8f30ac94d34ce8d9f7c33927a">AVMEDIA_TYPE_AUDIO</a></div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00194">avutil.h:194</a></div></div>
<div class="ttc" id="structOutputStream_html_a0c3b9816e5c50c0ed816343d224121e7"><div class="ttname"><a href="structOutputStream.html#a0c3b9816e5c50c0ed816343d224121e7">OutputStream::samples_count</a></div><div class="ttdeci">int samples_count</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00058">muxing.c:58</a></div></div>
<div class="ttc" id="avassert_8h_html"><div class="ttname"><a href="avassert_8h.html">avassert.h</a></div><div class="ttdoc">simple assert() macros that are a bit more flexible than ISO C assert(). </div></div>
<div class="ttc" id="structOutputStream_html_a09ee2998f47d0e69c99dee8a6f71105a"><div class="ttname"><a href="structOutputStream.html#a09ee2998f47d0e69c99dee8a6f71105a">OutputStream::frame</a></div><div class="ttdeci">AVFrame * frame</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00060">muxing.c:60</a></div></div>
<div class="ttc" id="group__lswr_html_ga5121a5a7890a2d23b72dc871dd0ebb06"><div class="ttname"><a href="group__lswr.html#ga5121a5a7890a2d23b72dc871dd0ebb06">swr_get_delay</a></div><div class="ttdeci">int64_t swr_get_delay(struct SwrContext *s, int64_t base)</div><div class="ttdoc">Gets the delay the next input sample will experience relative to the next output sample. </div></div>
<div class="ttc" id="group__lavc__core_html_ga38b16ee9a8fd4c57ffd4fef0db3481c6"><div class="ttname"><a href="group__lavc__core.html#ga38b16ee9a8fd4c57ffd4fef0db3481c6">AV_CODEC_CAP_VARIABLE_FRAME_SIZE</a></div><div class="ttdeci">#define AV_CODEC_CAP_VARIABLE_FRAME_SIZE</div><div class="ttdoc">Audio encoder supports receiving a different number of samples in each call. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l00935">avcodec.h:935</a></div></div>
<div class="ttc" id="group__lswr_html_ga4aa775b7fba31d2c8dc14c7b7e282863"><div class="ttname"><a href="group__lswr.html#ga4aa775b7fba31d2c8dc14c7b7e282863">SwrContext</a></div><div class="ttdeci">struct SwrContext SwrContext</div><div class="ttdoc">The libswresample context. </div><div class="ttdef"><b>Definition:</b> <a href="swresample_8h_source.html#l00186">swresample.h:186</a></div></div>
<div class="ttc" id="structAVCodecContext_html_aeb08c575a79eb84fc4155dda88f46c06"><div class="ttname"><a href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">AVCodecContext::channel_layout</a></div><div class="ttdeci">uint64_t channel_layout</div><div class="ttdoc">Audio channel layout. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l02338">avcodec.h:2338</a></div></div>
<div class="ttc" id="group__lavu__math_html_ga151744358fff630942b926e67e67c415"><div class="ttname"><a href="group__lavu__math.html#ga151744358fff630942b926e67e67c415">av_compare_ts</a></div><div class="ttdeci">int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)</div><div class="ttdoc">Compare 2 timestamps each in its own timebases. </div></div>
<div class="ttc" id="structAVStream_html_a56f20051fb99339cc588cd3a07ab8c96"><div class="ttname"><a href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">AVStream::codec</a></div><div class="ttdeci">AVCodecContext * codec</div><div class="ttdoc">Codec context associated with this stream. </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l00896">avformat.h:896</a></div></div>
<div class="ttc" id="structAVFrame_html_a5f343e0325e3e9d9ed20e34c9e156aef"><div class="ttname"><a href="structAVFrame.html#a5f343e0325e3e9d9ed20e34c9e156aef">AVFrame::channel_layout</a></div><div class="ttdeci">uint64_t channel_layout</div><div class="ttdoc">Channel layout of the audio data. </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00343">frame.h:343</a></div></div>
<div class="ttc" id="structAVFormatContext_html_a0b748d924898b08b89ff4974afd17285"><div class="ttname"><a href="structAVFormatContext.html#a0b748d924898b08b89ff4974afd17285">AVFormatContext::nb_streams</a></div><div class="ttdeci">unsigned int nb_streams</div><div class="ttdoc">Number of elements in AVFormatContext.streams. </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l01370">avformat.h:1370</a></div></div>
<div class="ttc" id="channel__layout_8h_html"><div class="ttname"><a href="channel__layout_8h.html">channel_layout.h</a></div><div class="ttdoc">audio channel layout utility functions </div></div>
<div class="ttc" id="muxing_8c_html_a368b2deb0a63160293db69808acfeff2"><div class="ttname"><a href="muxing_8c.html#a368b2deb0a63160293db69808acfeff2">alloc_audio_frame</a></div><div class="ttdeci">static AVFrame * alloc_audio_frame(enum AVSampleFormat sample_fmt, uint64_t channel_layout, int sample_rate, int nb_samples)</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00181">muxing.c:181</a></div></div>
<div class="ttc" id="group__lavf__encoding_html_ga18b7b10bb5b94c4842de18166bc677cb"><div class="ttname"><a href="group__lavf__encoding.html#ga18b7b10bb5b94c4842de18166bc677cb">avformat_write_header</a></div><div class="ttdeci">av_warn_unused_result int avformat_write_header(AVFormatContext *s, AVDictionary **options)</div><div class="ttdoc">Allocate the stream private data and write the stream header to an output media file. </div></div>
<div class="ttc" id="structAVCodecContext_html_a0d8f46461754e8abea0847dcbc41b956"><div class="ttname"><a href="structAVCodecContext.html#a0d8f46461754e8abea0847dcbc41b956">AVCodecContext::width</a></div><div class="ttdeci">int width</div><div class="ttdoc">picture width / height. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01711">avcodec.h:1711</a></div></div>
<div class="ttc" id="avformat_8h_html_ab203c7b734e9c31b7c37d34f6e2c6aef"><div class="ttname"><a href="avformat_8h.html#ab203c7b734e9c31b7c37d34f6e2c6aef">AVFMT_GLOBALHEADER</a></div><div class="ttdeci">#define AVFMT_GLOBALHEADER</div><div class="ttdoc">Format wants global header. </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l00484">avformat.h:484</a></div></div>
<div class="ttc" id="group__lavu__error_html_gac4f6e109c242c81aeee21868d3f35e12"><div class="ttname"><a href="group__lavu__error.html#gac4f6e109c242c81aeee21868d3f35e12">av_err2str</a></div><div class="ttdeci">#define av_err2str(errnum)</div><div class="ttdoc">Convenience macro, the return value should be used only directly in function arguments but never stan...</div><div class="ttdef"><b>Definition:</b> <a href="error_8h_source.html#l00119">error.h:119</a></div></div>
<div class="ttc" id="group__libsws_html_gad3af0ca76f071dbe0173444db9882932"><div class="ttname"><a href="group__libsws.html#gad3af0ca76f071dbe0173444db9882932">sws_freeContext</a></div><div class="ttdeci">void sws_freeContext(struct SwsContext *swsContext)</div><div class="ttdoc">Free the swscaler context swsContext. </div></div>
<div class="ttc" id="muxing_8c_html_acc346658c36a422fc9ab42bbb976138e"><div class="ttname"><a href="muxing_8c.html#acc346658c36a422fc9ab42bbb976138e">fill_yuv_image</a></div><div class="ttdeci">static void fill_yuv_image(AVFrame *pict, int frame_index, int width, int height)</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00420">muxing.c:420</a></div></div>
<div class="ttc" id="muxing_8c_html_a435288caae5076cca3273215cb6ad395"><div class="ttname"><a href="muxing_8c.html#a435288caae5076cca3273215cb6ad395">write_video_frame</a></div><div class="ttdeci">static int write_video_frame(AVFormatContext *oc, OutputStream *ost)</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00490">muxing.c:490</a></div></div>
<div class="ttc" id="structAVCodecContext_html_a66af0e26734255f1eacabd7d67558482"><div class="ttname"><a href="structAVCodecContext.html#a66af0e26734255f1eacabd7d67558482">AVCodecContext::mb_decision</a></div><div class="ttdeci">int mb_decision</div><div class="ttdoc">macroblock decision mode </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l02086">avcodec.h:2086</a></div></div>
<div class="ttc" id="structAVCodecContext_html_a0449afd803eb107bd4dbc8b5ea22e363"><div class="ttname"><a href="structAVCodecContext.html#a0449afd803eb107bd4dbc8b5ea22e363">AVCodecContext::height</a></div><div class="ttdeci">int height</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01711">avcodec.h:1711</a></div></div>
<div class="ttc" id="muxing_8c_html_ae67b157ab0198fa81bf675b378ff06fd"><div class="ttname"><a href="muxing_8c.html#ae67b157ab0198fa81bf675b378ff06fd">STREAM_PIX_FMT</a></div><div class="ttdeci">#define STREAM_PIX_FMT</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00048">muxing.c:48</a></div></div>
<div class="ttc" id="group__lavc__core_html_ggaadca229ad2c20e060a14fec08a5cc7ceaf614abb36f7c5d0c42ed522c1d6c99f0"><div class="ttname"><a href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7ceaf614abb36f7c5d0c42ed522c1d6c99f0">AV_CODEC_ID_MPEG2VIDEO</a></div><div class="ttdoc">preferred ID for MPEG-1/2 video decoding </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l00106">avcodec.h:106</a></div></div>
<div class="ttc" id="group__lavc__misc_html_ga2016a52e94f867ebe5113bdf448e182d"><div class="ttname"><a href="group__lavc__misc.html#ga2016a52e94f867ebe5113bdf448e182d">avcodec_get_name</a></div><div class="ttdeci">const char * avcodec_get_name(enum AVCodecID id)</div><div class="ttdoc">Get the name of a codec. </div></div>
<div class="ttc" id="structAVStream_html"><div class="ttname"><a href="structAVStream.html">AVStream</a></div><div class="ttdoc">Stream structure. </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l00877">avformat.h:877</a></div></div>
<div class="ttc" id="structAVFrame_html_aed14fa772ce46881020fd1545c86432c"><div class="ttname"><a href="structAVFrame.html#aed14fa772ce46881020fd1545c86432c">AVFrame::format</a></div><div class="ttdeci">int format</div><div class="ttdoc">format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...</div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00242">frame.h:242</a></div></div>
<div class="ttc" id="structAVCodecContext_html_aec57f0d859a6df8b479cd93ca3a44a33"><div class="ttname"><a href="structAVCodecContext.html#aec57f0d859a6df8b479cd93ca3a44a33">AVCodecContext::frame_size</a></div><div class="ttdeci">int frame_size</div><div class="ttdoc">Number of samples per channel in an audio frame. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l02307">avcodec.h:2307</a></div></div>
<div class="ttc" id="muxing_8c_html_ace0cad5fe744009aeaa62eb1fbb31831"><div class="ttname"><a href="muxing_8c.html#ace0cad5fe744009aeaa62eb1fbb31831">STREAM_DURATION</a></div><div class="ttdeci">#define STREAM_DURATION</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00046">muxing.c:46</a></div></div>
<div class="ttc" id="group__lavu__sampfmts_html_gaf9a51ca15301871723577c730b5865c5"><div class="ttname"><a href="group__lavu__sampfmts.html#gaf9a51ca15301871723577c730b5865c5">AVSampleFormat</a></div><div class="ttdeci">AVSampleFormat</div><div class="ttdoc">Audio sample formats. </div><div class="ttdef"><b>Definition:</b> <a href="samplefmt_8h_source.html#l00059">samplefmt.h:59</a></div></div>
<div class="ttc" id="structAVCodecContext_html_adc5f65d6099fd8339c1580c091777223"><div class="ttname"><a href="structAVCodecContext.html#adc5f65d6099fd8339c1580c091777223">AVCodecContext::codec_id</a></div><div class="ttdeci">enum AVCodecID codec_id</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01549">avcodec.h:1549</a></div></div>
<div class="ttc" id="structAVCodecContext_html_a8ff0b000c463361e234af48d03aadfc0"><div class="ttname"><a href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">AVCodecContext::sample_rate</a></div><div class="ttdeci">int sample_rate</div><div class="ttdoc">samples per second </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l02287">avcodec.h:2287</a></div></div>
<div class="ttc" id="structAVFrame_html_aa52bfc6605f6a3059a0c3226cc0f6567"><div class="ttname"><a href="structAVFrame.html#aa52bfc6605f6a3059a0c3226cc0f6567">AVFrame::linesize</a></div><div class="ttdeci">int linesize[AV_NUM_DATA_POINTERS]</div><div class="ttdoc">For video, size in bytes of each picture line. </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00209">frame.h:209</a></div></div>
<div class="ttc" id="structAVFormatContext_html_a1e7324262b6b78522e52064daaa7bc87"><div class="ttname"><a href="structAVFormatContext.html#a1e7324262b6b78522e52064daaa7bc87">AVFormatContext::pb</a></div><div class="ttdeci">AVIOContext * pb</div><div class="ttdoc">I/O context. </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l01356">avformat.h:1356</a></div></div>
<div class="ttc" id="structAVCodecContext_html"><div class="ttname"><a href="structAVCodecContext.html">AVCodecContext</a></div><div class="ttdoc">main external API structure. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01532">avcodec.h:1532</a></div></div>
<div class="ttc" id="muxing_8c_html_a2a1515bfcdc1e221407cba978bcad1f0"><div class="ttname"><a href="muxing_8c.html#a2a1515bfcdc1e221407cba978bcad1f0">get_video_frame</a></div><div class="ttdeci">static AVFrame * get_video_frame(OutputStream *ost)</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00449">muxing.c:449</a></div></div>
<div class="ttc" id="group__lswr_html_ga818f7d78b1ad7d8d5b70de374b668c34"><div class="ttname"><a href="group__lswr.html#ga818f7d78b1ad7d8d5b70de374b668c34">swr_free</a></div><div class="ttdeci">void swr_free(struct SwrContext **s)</div><div class="ttdoc">Free the given SwrContext and set the pointer to NULL. </div></div>
<div class="ttc" id="group__libsws_html_gae531c9754c9205d90ad6800015046d74"><div class="ttname"><a href="group__libsws.html#gae531c9754c9205d90ad6800015046d74">sws_scale</a></div><div class="ttdeci">int sws_scale(struct SwsContext *c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[])</div><div class="ttdoc">Scale the image slice in srcSlice and put the resulting scaled slice in the image in dst...</div></div>
<div class="ttc" id="group__lavu__dict_html_ga8d9c2de72b310cef8e6a28c9cd3acbbe"><div class="ttname"><a href="group__lavu__dict.html#ga8d9c2de72b310cef8e6a28c9cd3acbbe">av_dict_set</a></div><div class="ttdeci">int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)</div><div class="ttdoc">Set the given entry in *pm, overwriting an existing entry. </div></div>
<div class="ttc" id="structAVFrame_html_ac85daa1316e1f47e78da0ca19b7c60e6"><div class="ttname"><a href="structAVFrame.html#ac85daa1316e1f47e78da0ca19b7c60e6">AVFrame::sample_rate</a></div><div class="ttdeci">int sample_rate</div><div class="ttdoc">Sample rate of the audio data. </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00338">frame.h:338</a></div></div>
<div class="ttc" id="structAVRational_html"><div class="ttname"><a href="structAVRational.html">AVRational</a></div><div class="ttdoc">rational number numerator/denominator </div><div class="ttdef"><b>Definition:</b> <a href="rational_8h_source.html#l00043">rational.h:43</a></div></div>
<div class="ttc" id="muxing_8c_html_ad0fa7a6ac51a4021276c0a04dfe2283b"><div class="ttname"><a href="muxing_8c.html#ad0fa7a6ac51a4021276c0a04dfe2283b">STREAM_FRAME_RATE</a></div><div class="ttdeci">#define STREAM_FRAME_RATE</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00047">muxing.c:47</a></div></div>
<div class="ttc" id="group__lavc__core_html_ga11f785a188d7d9df71621001465b0f1d"><div class="ttname"><a href="group__lavc__core.html#ga11f785a188d7d9df71621001465b0f1d">avcodec_open2</a></div><div class="ttdeci">int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)</div><div class="ttdoc">Initialize the AVCodecContext to use the given AVCodec. </div></div>
<div class="ttc" id="group__lavf__core_html_gac2990b13b68e831a408fce8e1d0d6445"><div class="ttname"><a href="group__lavf__core.html#gac2990b13b68e831a408fce8e1d0d6445">avformat_free_context</a></div><div class="ttdeci">void avformat_free_context(AVFormatContext *s)</div><div class="ttdoc">Free an AVFormatContext and all its streams. </div></div>
<div class="ttc" id="group__lavu__frame_html_ga6b1acbfa82c79bf7fd78d868572f0ceb"><div class="ttname"><a href="group__lavu__frame.html#ga6b1acbfa82c79bf7fd78d868572f0ceb">av_frame_get_buffer</a></div><div class="ttdeci">int av_frame_get_buffer(AVFrame *frame, int align)</div><div class="ttdoc">Allocate new buffer(s) for audio or video data. </div></div>
<div class="ttc" id="group__lavu__frame_html_gadd5417c06f5a6b419b0dbd8f0ff363fd"><div class="ttname"><a href="group__lavu__frame.html#gadd5417c06f5a6b419b0dbd8f0ff363fd">av_frame_make_writable</a></div><div class="ttdeci">int av_frame_make_writable(AVFrame *frame)</div><div class="ttdoc">Ensure that the frame data is writable, avoiding data copy if possible. </div></div>
<div class="ttc" id="structAVFrame_html_a1d0f65014a8d1bf78cec8cbed2304992"><div class="ttname"><a href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">AVFrame::data</a></div><div class="ttdeci">uint8_t * data[AV_NUM_DATA_POINTERS]</div><div class="ttdoc">pointer to the picture/channel planes. </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00192">frame.h:192</a></div></div>
<div class="ttc" id="group__lavc__core_html_ga9ed82634c59b339786575827c47a8f68"><div class="ttname"><a href="group__lavc__core.html#ga9ed82634c59b339786575827c47a8f68">AV_CODEC_FLAG_GLOBAL_HEADER</a></div><div class="ttdeci">#define AV_CODEC_FLAG_GLOBAL_HEADER</div><div class="ttdoc">Place global headers in extradata instead of every keyframe. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l00783">avcodec.h:783</a></div></div>
<div class="ttc" id="structAVCodecContext_html_a9b6b3f1fcbdcc2ad9f4dbb4370496e38"><div class="ttname"><a href="structAVCodecContext.html#a9b6b3f1fcbdcc2ad9f4dbb4370496e38">AVCodecContext::gop_size</a></div><div class="ttdeci">int gop_size</div><div class="ttdoc">the number of pictures in a group of pictures, or 0 for intra_only </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01737">avcodec.h:1737</a></div></div>
<div class="ttc" id="avformat_8h_html"><div class="ttname"><a href="avformat_8h.html">avformat.h</a></div><div class="ttdoc">Main libavformat public API header. </div></div>
<div class="ttc" id="pixfmt_8h_html_a9a8e335cf3be472042bc9f0cf80cd4c5a1aa7677092740d8def31655b5d7f0cc2"><div class="ttname"><a href="pixfmt_8h.html#a9a8e335cf3be472042bc9f0cf80cd4c5a1aa7677092740d8def31655b5d7f0cc2">AV_PIX_FMT_YUV420P</a></div><div class="ttdoc">planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples) </div><div class="ttdef"><b>Definition:</b> <a href="pixfmt_8h_source.html#l00063">pixfmt.h:63</a></div></div>
<div class="ttc" id="avformat_8h_html_a752cce390d480521919aa5d8be24ac0b"><div class="ttname"><a href="avformat_8h.html#a752cce390d480521919aa5d8be24ac0b">AVFMT_NOFILE</a></div><div class="ttdeci">#define AVFMT_NOFILE</div><div class="ttdoc">Demuxer will use avio_open, no opened file should be provided by the caller. </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l00477">avformat.h:477</a></div></div>
<div class="ttc" id="group__lavu__sampfmts_html_ggaf9a51ca15301871723577c730b5865c5aea6132df57aebc3f76e10665395c46af"><div class="ttname"><a href="group__lavu__sampfmts.html#ggaf9a51ca15301871723577c730b5865c5aea6132df57aebc3f76e10665395c46af">AV_SAMPLE_FMT_S16</a></div><div class="ttdoc">signed 16 bits </div><div class="ttdef"><b>Definition:</b> <a href="samplefmt_8h_source.html#l00062">samplefmt.h:62</a></div></div>
<div class="ttc" id="muxing_8c_html_ae7697b74a6a8605a91487b43e31f29be"><div class="ttname"><a href="muxing_8c.html#ae7697b74a6a8605a91487b43e31f29be">open_audio</a></div><div class="ttdeci">static void open_audio(AVFormatContext *oc, AVCodec *codec, OutputStream *ost, AVDictionary *opt_arg)</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00209">muxing.c:209</a></div></div>
<div class="ttc" id="structOutputStream_html_ab5bc1d10f171e32c5241ab23271ae765"><div class="ttname"><a href="structOutputStream.html#ab5bc1d10f171e32c5241ab23271ae765">OutputStream::t</a></div><div class="ttdeci">float t</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00063">muxing.c:63</a></div></div>
<div class="ttc" id="structAVOutputFormat_html"><div class="ttname"><a href="structAVOutputFormat.html">AVOutputFormat</a></div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l00522">avformat.h:522</a></div></div>
<div class="ttc" id="group__lavc__packet_html_gac9cb9756175b96e7441575803757fb73"><div class="ttname"><a href="group__lavc__packet.html#gac9cb9756175b96e7441575803757fb73">av_init_packet</a></div><div class="ttdeci">void av_init_packet(AVPacket *pkt)</div><div class="ttdoc">Initialize optional fields of a packet with default values. </div></div>
<div class="ttc" id="muxing_8c_html_ab85f450fd9ee7aad777fc135b62dd3cd"><div class="ttname"><a href="muxing_8c.html#ab85f450fd9ee7aad777fc135b62dd3cd">write_frame</a></div><div class="ttdeci">static int write_frame(AVFormatContext *fmt_ctx, const AVRational *time_base, AVStream *st, AVPacket *pkt)</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00080">muxing.c:80</a></div></div>
<div class="ttc" id="structOutputStream_html"><div class="ttname"><a href="structOutputStream.html">OutputStream</a></div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00053">muxing.c:53</a></div></div>
<div class="ttc" id="timestamp_8h_html_a86d797e907fa454ed5fd34bfb0bcd747"><div class="ttname"><a href="timestamp_8h.html#a86d797e907fa454ed5fd34bfb0bcd747">av_ts2str</a></div><div class="ttdeci">#define av_ts2str(ts)</div><div class="ttdoc">Convenience macro, the return value should be used only directly in function arguments but never stan...</div><div class="ttdef"><b>Definition:</b> <a href="timestamp_8h_source.html#l00054">timestamp.h:54</a></div></div>
<div class="ttc" id="structAVCodecContext_html_ac1e6c2cd1269caa7570575725c682a49"><div class="ttname"><a href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">AVCodecContext::channels</a></div><div class="ttdeci">int channels</div><div class="ttdoc">number of audio channels </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l02288">avcodec.h:2288</a></div></div>
<div class="ttc" id="structAVOutputFormat_html_a2e4fff0aa061984d586ea08ecad96141"><div class="ttname"><a href="structAVOutputFormat.html#a2e4fff0aa061984d586ea08ecad96141">AVOutputFormat::audio_codec</a></div><div class="ttdeci">enum AVCodecID audio_codec</div><div class="ttdoc">default audio codec </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l00533">avformat.h:533</a></div></div>
<div class="ttc" id="structOutputStream_html_a2ffa8b8369d869e8a440c2611ba91ae2"><div class="ttname"><a href="structOutputStream.html#a2ffa8b8369d869e8a440c2611ba91ae2">OutputStream::tmp_frame</a></div><div class="ttdeci">AVFrame * tmp_frame</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00061">muxing.c:61</a></div></div>
<div class="ttc" id="structAVPacket_html_a85dbbd306b44b02390cd91c45e6a0f76"><div class="ttname"><a href="structAVPacket.html#a85dbbd306b44b02390cd91c45e6a0f76">AVPacket::dts</a></div><div class="ttdeci">int64_t dts</div><div class="ttdoc">Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01466">avcodec.h:1466</a></div></div>
<div class="ttc" id="group__lavf__encoding_html_ga7f14007e7dc8f481f054b21614dfec13"><div class="ttname"><a href="group__lavf__encoding.html#ga7f14007e7dc8f481f054b21614dfec13">av_write_trailer</a></div><div class="ttdeci">int av_write_trailer(AVFormatContext *s)</div><div class="ttdoc">Write the stream trailer to an output media file and free the file private data. </div></div>
<div class="ttc" id="structAVFrame_html_a3f89733f429c98ba5bc64373fb0a3f13"><div class="ttname"><a href="structAVFrame.html#a3f89733f429c98ba5bc64373fb0a3f13">AVFrame::height</a></div><div class="ttdeci">int height</div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00230">frame.h:230</a></div></div>
<div class="ttc" id="group__lavu__misc_html_gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5"><div class="ttname"><a href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5">AVMEDIA_TYPE_VIDEO</a></div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00193">avutil.h:193</a></div></div>
<div class="ttc" id="mathematics_8h_html_ae71449b1cc6e6250b91f539153a7a0d3"><div class="ttname"><a href="mathematics_8h.html#ae71449b1cc6e6250b91f539153a7a0d3">M_PI</a></div><div class="ttdeci">#define M_PI</div><div class="ttdef"><b>Definition:</b> <a href="mathematics_8h_source.html#l00046">mathematics.h:46</a></div></div>
<div class="ttc" id="demuxing__decoding_8c_html_ad12fc34ce789bce6c8a05d8a17138534"><div class="ttname"><a href="demuxing__decoding_8c.html#ad12fc34ce789bce6c8a05d8a17138534">height</a></div><div class="ttdeci">static int height</div><div class="ttdef"><b>Definition:</b> <a href="demuxing__decoding_8c_source.html#l00039">demuxing_decoding.c:39</a></div></div>
<div class="ttc" id="structAVPacket_html_a0d1cb9b5a32b00fb6edc81ea3aae2a49"><div class="ttname"><a href="structAVPacket.html#a0d1cb9b5a32b00fb6edc81ea3aae2a49">AVPacket::stream_index</a></div><div class="ttdeci">int stream_index</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01469">avcodec.h:1469</a></div></div>
<div class="ttc" id="structAVStream_html_a9db755451f14e2bf590d4b85d82b32e6"><div class="ttname"><a href="structAVStream.html#a9db755451f14e2bf590d4b85d82b32e6">AVStream::time_base</a></div><div class="ttdeci">AVRational time_base</div><div class="ttdoc">This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...</div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l00919">avformat.h:919</a></div></div>
<div class="ttc" id="group__opt__set__funcs_html_gad446f7a7b92442e464d43e400e661040"><div class="ttname"><a href="group__opt__set__funcs.html#gad446f7a7b92442e464d43e400e661040">av_opt_set_sample_fmt</a></div><div class="ttdeci">int av_opt_set_sample_fmt(void *obj, const char *name, enum AVSampleFormat fmt, int search_flags)</div></div>
<div class="ttc" id="pixfmt_8h_html_a9a8e335cf3be472042bc9f0cf80cd4c5"><div class="ttname"><a href="pixfmt_8h.html#a9a8e335cf3be472042bc9f0cf80cd4c5">AVPixelFormat</a></div><div class="ttdeci">AVPixelFormat</div><div class="ttdoc">Pixel format. </div><div class="ttdef"><b>Definition:</b> <a href="pixfmt_8h_source.html#l00061">pixfmt.h:61</a></div></div>
<div class="ttc" id="structAVPacket_html"><div class="ttname"><a href="structAVPacket.html">AVPacket</a></div><div class="ttdoc">This structure stores compressed data. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01444">avcodec.h:1444</a></div></div>
<div class="ttc" id="group__lavf__core_html_ga917265caec45ef5a0646356ed1a507e3"><div class="ttname"><a href="group__lavf__core.html#ga917265caec45ef5a0646356ed1a507e3">av_register_all</a></div><div class="ttdeci">void av_register_all(void)</div><div class="ttdoc">Initialize libavformat and register all the muxers, demuxers and protocols. </div></div>
<div class="ttc" id="avio_8h_html_ae118a1f37f1e48617609ead9910aac15"><div class="ttname"><a href="avio_8h.html#ae118a1f37f1e48617609ead9910aac15">avio_closep</a></div><div class="ttdeci">int avio_closep(AVIOContext **s)</div><div class="ttdoc">Close the resource accessed by the AVIOContext *s, free it and set the pointer pointing to it to NULL...</div></div>
<div class="ttc" id="structAVFrame_html_a02f45ab8191aea1660159f1e464237ea"><div class="ttname"><a href="structAVFrame.html#a02f45ab8191aea1660159f1e464237ea">AVFrame::nb_samples</a></div><div class="ttdeci">int nb_samples</div><div class="ttdoc">number of audio samples (per channel) described by this frame </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00235">frame.h:235</a></div></div>
<div class="ttc" id="structOutputStream_html_a04fe3fc54e1a382047e501c4ce63497b"><div class="ttname"><a href="structOutputStream.html#a04fe3fc54e1a382047e501c4ce63497b">OutputStream::tincr2</a></div><div class="ttdeci">float tincr2</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00063">muxing.c:63</a></div></div>
<div class="ttc" id="structAVPacket_html_a73bde0a37f3b1efc839f11295bfbf42a"><div class="ttname"><a href="structAVPacket.html#a73bde0a37f3b1efc839f11295bfbf42a">AVPacket::pts</a></div><div class="ttdeci">int64_t pts</div><div class="ttdoc">Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01460">avcodec.h:1460</a></div></div>
<div class="ttc" id="structOutputStream_html_a87e6c2172dab3143e4857aaaf6558573"><div class="ttname"><a href="structOutputStream.html#a87e6c2172dab3143e4857aaaf6558573">OutputStream::sws_ctx</a></div><div class="ttdeci">struct SwsContext * sws_ctx</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00065">muxing.c:65</a></div></div>
<div class="ttc" id="muxing_8c_html_a58000b15271c25fa9b2839d82f6971dc"><div class="ttname"><a href="muxing_8c.html#a58000b15271c25fa9b2839d82f6971dc">get_audio_frame</a></div><div class="ttdeci">static AVFrame * get_audio_frame(OutputStream *ost)</div><div class="ttdef"><b>Definition:</b> <a href="muxing_8c_source.html#l00267">muxing.c:267</a></div></div>
<div class="ttc" id="group__lswr_html_gae173e8ed91717700471a1dcd06f00f67"><div class="ttname"><a href="group__lswr.html#gae173e8ed91717700471a1dcd06f00f67">swr_init</a></div><div class="ttdeci">int swr_init(struct SwrContext *s)</div><div class="ttdoc">Initialize context after user parameters have been set. </div></div>
<div class="ttc" id="demuxing__decoding_8c_html_a2474a5474cbff19523a51eb1de01cda4"><div class="ttname"><a href="demuxing__decoding_8c.html#a2474a5474cbff19523a51eb1de01cda4">width</a></div><div class="ttdeci">static int width</div><div class="ttdef"><b>Definition:</b> <a href="demuxing__decoding_8c_source.html#l00039">demuxing_decoding.c:39</a></div></div>
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