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showbox-public-14
showbox-public-14 / ffmpeg-doc deb
Repository URL to install this package:
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<div id="projectname">FFmpeg
 <span id="projectnumber">3.0.2</span>
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<div class="title">transcoding.c</div> </div>
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<div class="fragment"><div class="line"><span class="comment">/*</span></div>
<div class="line"><span class="comment"> * Copyright (c) 2010 Nicolas George</span></div>
<div class="line"><span class="comment"> * Copyright (c) 2011 Stefano Sabatini</span></div>
<div class="line"><span class="comment"> * Copyright (c) 2014 Andrey Utkin</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining a copy</span></div>
<div class="line"><span class="comment"> * of this software and associated documentation files (the "Software"), to deal</span></div>
<div class="line"><span class="comment"> * in the Software without restriction, including without limitation the rights</span></div>
<div class="line"><span class="comment"> * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell</span></div>
<div class="line"><span class="comment"> * copies of the Software, and to permit persons to whom the Software is</span></div>
<div class="line"><span class="comment"> * furnished to do so, subject to the following conditions:</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * The above copyright notice and this permission notice shall be included in</span></div>
<div class="line"><span class="comment"> * all copies or substantial portions of the Software.</span></div>
<div class="line"><span class="comment"> *</span></div>
<div class="line"><span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</span></div>
<div class="line"><span class="comment"> * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</span></div>
<div class="line"><span class="comment"> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL</span></div>
<div class="line"><span class="comment"> * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</span></div>
<div class="line"><span class="comment"> * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,</span></div>
<div class="line"><span class="comment"> * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN</span></div>
<div class="line"><span class="comment"> * THE SOFTWARE.</span></div>
<div class="line"><span class="comment"> */</span></div>
<div class="line"><span class="comment"></span></div>
<div class="line"><span class="comment">/**</span></div>
<div class="line"><span class="comment"> * @file</span></div>
<div class="line"><span class="comment"> * API example for demuxing, decoding, filtering, encoding and muxing</span></div>
<div class="line"><span class="comment"> * @example transcoding.c</span></div>
<div class="line"><span class="comment"> */</span></div>
<div class="line"></div>
<div class="line"><span class="preprocessor">#include <<a class="code" href="avcodec_8h.html">libavcodec/avcodec.h</a>></span></div>
<div class="line"><span class="preprocessor">#include <<a class="code" href="avformat_8h.html">libavformat/avformat.h</a>></span></div>
<div class="line"><span class="preprocessor">#include <<a class="code" href="avfiltergraph_8h.html">libavfilter/avfiltergraph.h</a>></span></div>
<div class="line"><span class="preprocessor">#include <<a class="code" href="buffersink_8h.html">libavfilter/buffersink.h</a>></span></div>
<div class="line"><span class="preprocessor">#include <<a class="code" href="buffersrc_8h.html">libavfilter/buffersrc.h</a>></span></div>
<div class="line"><span class="preprocessor">#include <<a class="code" href="opt_8h.html">libavutil/opt.h</a>></span></div>
<div class="line"><span class="preprocessor">#include <<a class="code" href="pixdesc_8h.html">libavutil/pixdesc.h</a>></span></div>
<div class="line"></div>
<div class="line"><span class="keyword">static</span> <a name="_a0"></a><a class="code" href="structAVFormatContext.html">AVFormatContext</a> *<a name="a1"></a><a class="code" href="transcoding_8c.html#a24170971d926c1359c289f2515dec3d7">ifmt_ctx</a>;</div>
<div class="line"><span class="keyword">static</span> <a class="code" href="structAVFormatContext.html">AVFormatContext</a> *<a name="a2"></a><a class="code" href="transcoding_8c.html#aad50129a22f90b00b5d5cc7551175093">ofmt_ctx</a>;</div>
<div class="line"><span class="keyword">typedef</span> <span class="keyword">struct </span><a name="_a3"></a><a class="code" href="structFilteringContext.html">FilteringContext</a> {</div>
<div class="line"> <a name="_a4"></a><a class="code" href="structAVFilterContext.html">AVFilterContext</a> *<a name="a5"></a><a class="code" href="structFilteringContext.html#a4476c9e6fb492172c909ae4a47c47233">buffersink_ctx</a>;</div>
<div class="line"> <a class="code" href="structAVFilterContext.html">AVFilterContext</a> *<a name="a6"></a><a class="code" href="structFilteringContext.html#a25c500d3728df3a9f904e6d86cf55f11">buffersrc_ctx</a>;</div>
<div class="line"> <a name="_a7"></a><a class="code" href="structAVFilterGraph.html">AVFilterGraph</a> *<a name="a8"></a><a class="code" href="structFilteringContext.html#aaf35e44d4e6100095b1db444e2d316cd">filter_graph</a>;</div>
<div class="line">} <a class="code" href="structFilteringContext.html">FilteringContext</a>;</div>
<div class="line"><span class="keyword">static</span> <a class="code" href="structFilteringContext.html">FilteringContext</a> *<a name="a9"></a><a class="code" href="transcoding_8c.html#aac21c1c8f68cdafd001a6a13dc4d7fb7">filter_ctx</a>;</div>
<div class="line"></div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">int</span> <a name="a10"></a><a class="code" href="transcoding_8c.html#abd04bf1a933d4d2698482f4949c61fed">open_input_file</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *filename)</div>
<div class="line">{</div>
<div class="line"> <span class="keywordtype">int</span> ret;</div>
<div class="line"> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i;</div>
<div class="line"></div>
<div class="line"> ifmt_ctx = NULL;</div>
<div class="line"> <span class="keywordflow">if</span> ((ret = <a name="a11"></a><a class="code" href="group__lavf__decoding.html#ga31d601155e9035d5b0e7efedc894ee49">avformat_open_input</a>(&ifmt_ctx, filename, NULL, NULL)) < 0) {</div>
<div class="line"> <a name="a12"></a><a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a name="a13"></a><a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Cannot open input file\n"</span>);</div>
<div class="line"> <span class="keywordflow">return</span> ret;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> ((ret = <a name="a14"></a><a class="code" href="group__lavf__decoding.html#gad42172e27cddafb81096939783b157bb">avformat_find_stream_info</a>(ifmt_ctx, NULL)) < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Cannot find stream information\n"</span>);</div>
<div class="line"> <span class="keywordflow">return</span> ret;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">for</span> (i = 0; i < ifmt_ctx-><a name="a15"></a><a class="code" href="structAVFormatContext.html#a0b748d924898b08b89ff4974afd17285">nb_streams</a>; i++) {</div>
<div class="line"> <a name="_a16"></a><a class="code" href="structAVStream.html">AVStream</a> *stream;</div>
<div class="line"> <a name="_a17"></a><a class="code" href="structAVCodecContext.html">AVCodecContext</a> *codec_ctx;</div>
<div class="line"> stream = ifmt_ctx-><a name="a18"></a><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[i];</div>
<div class="line"> codec_ctx = stream-><a name="a19"></a><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>;</div>
<div class="line"> <span class="comment">/* Reencode video & audio and remux subtitles etc. */</span></div>
<div class="line"> <span class="keywordflow">if</span> (codec_ctx-><a name="a20"></a><a class="code" href="structAVCodecContext.html#a3f99ca3115c44e6d7772c9384faf15e6">codec_type</a> == <a name="a21"></a><a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5">AVMEDIA_TYPE_VIDEO</a></div>
<div class="line"> || codec_ctx-><a class="code" href="structAVCodecContext.html#a3f99ca3115c44e6d7772c9384faf15e6">codec_type</a> == <a name="a22"></a><a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a7b4e33b8f30ac94d34ce8d9f7c33927a">AVMEDIA_TYPE_AUDIO</a>) {</div>
<div class="line"> <span class="comment">/* Open decoder */</span></div>
<div class="line"> ret = <a name="a23"></a><a class="code" href="group__lavc__core.html#ga11f785a188d7d9df71621001465b0f1d">avcodec_open2</a>(codec_ctx,</div>
<div class="line"> <a name="a24"></a><a class="code" href="group__lavc__decoding.html#ga19a0ca553277f019dd5b0fec6e1f9dca">avcodec_find_decoder</a>(codec_ctx-><a name="a25"></a><a class="code" href="structAVCodecContext.html#adc5f65d6099fd8339c1580c091777223">codec_id</a>), NULL);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Failed to open decoder for stream #%u\n"</span>, i);</div>
<div class="line"> <span class="keywordflow">return</span> ret;</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <a name="a26"></a><a class="code" href="group__lavf__misc.html#gae2645941f2dc779c307eb6314fd39f10">av_dump_format</a>(ifmt_ctx, 0, filename, 0);</div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">int</span> <a name="a27"></a><a class="code" href="transcoding_8c.html#ab6c33edf9a42e2f71594a7cdc6276407">open_output_file</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *filename)</div>
<div class="line">{</div>
<div class="line"> <a class="code" href="structAVStream.html">AVStream</a> *out_stream;</div>
<div class="line"> <a class="code" href="structAVStream.html">AVStream</a> *in_stream;</div>
<div class="line"> <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *<a name="a28"></a><a class="code" href="filtering__audio_8c.html#ac2bf6798f37e95d3d2ff2d44e4ab3c12">dec_ctx</a>, *enc_ctx;</div>
<div class="line"> <a name="_a29"></a><a class="code" href="structAVCodec.html">AVCodec</a> *encoder;</div>
<div class="line"> <span class="keywordtype">int</span> ret;</div>
<div class="line"> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i;</div>
<div class="line"></div>
<div class="line"> ofmt_ctx = NULL;</div>
<div class="line"> <a name="a30"></a><a class="code" href="avformat_8h.html#a6ddf3d982feb45fa5081420ee911f5d5">avformat_alloc_output_context2</a>(&ofmt_ctx, NULL, NULL, filename);</div>
<div class="line"> <span class="keywordflow">if</span> (!ofmt_ctx) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Could not create output context\n"</span>);</div>
<div class="line"> <span class="keywordflow">return</span> <a name="a31"></a><a class="code" href="group__lavu__error.html#ga4ebaa288c7684a26a591c501208910e4">AVERROR_UNKNOWN</a>;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">for</span> (i = 0; i < ifmt_ctx-><a class="code" href="structAVFormatContext.html#a0b748d924898b08b89ff4974afd17285">nb_streams</a>; i++) {</div>
<div class="line"> out_stream = <a name="a32"></a><a class="code" href="group__lavf__core.html#gadcb0fd3e507d9b58fe78f61f8ad39827">avformat_new_stream</a>(ofmt_ctx, NULL);</div>
<div class="line"> <span class="keywordflow">if</span> (!out_stream) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Failed allocating output stream\n"</span>);</div>
<div class="line"> <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#ga4ebaa288c7684a26a591c501208910e4">AVERROR_UNKNOWN</a>;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> in_stream = ifmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[i];</div>
<div class="line"> dec_ctx = in_stream-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>;</div>
<div class="line"> enc_ctx = out_stream-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>;</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> (dec_ctx-><a class="code" href="structAVCodecContext.html#a3f99ca3115c44e6d7772c9384faf15e6">codec_type</a> == <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5">AVMEDIA_TYPE_VIDEO</a></div>
<div class="line"> || dec_ctx-><a class="code" href="structAVCodecContext.html#a3f99ca3115c44e6d7772c9384faf15e6">codec_type</a> == <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a7b4e33b8f30ac94d34ce8d9f7c33927a">AVMEDIA_TYPE_AUDIO</a>) {</div>
<div class="line"> <span class="comment">/* in this example, we choose transcoding to same codec */</span></div>
<div class="line"> encoder = <a name="a33"></a><a class="code" href="group__lavc__encoding.html#ga9f820c481615c3a02d0407bac0bdbf25">avcodec_find_encoder</a>(dec_ctx-><a class="code" href="structAVCodecContext.html#adc5f65d6099fd8339c1580c091777223">codec_id</a>);</div>
<div class="line"> <span class="keywordflow">if</span> (!encoder) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a name="a34"></a><a class="code" href="group__lavu__log__constants.html#ga96970a2980bf6ad28cd403e7dc52d6c5">AV_LOG_FATAL</a>, <span class="stringliteral">"Necessary encoder not found\n"</span>);</div>
<div class="line"> <span class="keywordflow">return</span> <a name="a35"></a><a class="code" href="group__lavu__error.html#gaa6e5781e75b15ce44b0baea170c98a45">AVERROR_INVALIDDATA</a>;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* In this example, we transcode to same properties (picture size,</span></div>
<div class="line"><span class="comment"> * sample rate etc.). These properties can be changed for output</span></div>
<div class="line"><span class="comment"> * streams easily using filters */</span></div>
<div class="line"> <span class="keywordflow">if</span> (dec_ctx-><a class="code" href="structAVCodecContext.html#a3f99ca3115c44e6d7772c9384faf15e6">codec_type</a> == <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5">AVMEDIA_TYPE_VIDEO</a>) {</div>
<div class="line"> enc_ctx-><a name="a36"></a><a class="code" href="structAVCodecContext.html#a0449afd803eb107bd4dbc8b5ea22e363">height</a> = dec_ctx-><a class="code" href="structAVCodecContext.html#a0449afd803eb107bd4dbc8b5ea22e363">height</a>;</div>
<div class="line"> enc_ctx-><a name="a37"></a><a class="code" href="structAVCodecContext.html#a0d8f46461754e8abea0847dcbc41b956">width</a> = dec_ctx-><a class="code" href="structAVCodecContext.html#a0d8f46461754e8abea0847dcbc41b956">width</a>;</div>
<div class="line"> enc_ctx-><a name="a38"></a><a class="code" href="structAVCodecContext.html#a5252d34fbce300228d4dbda19a8c3293">sample_aspect_ratio</a> = dec_ctx-><a class="code" href="structAVCodecContext.html#a5252d34fbce300228d4dbda19a8c3293">sample_aspect_ratio</a>;</div>
<div class="line"> <span class="comment">/* take first format from list of supported formats */</span></div>
<div class="line"> enc_ctx-><a name="a39"></a><a class="code" href="structAVCodecContext.html#a0425c77b3d06d71e5db88b1d7e1b37f2">pix_fmt</a> = encoder-><a name="a40"></a><a class="code" href="structAVCodec.html#ac2b97bd3c19686025e1b7d577329c250">pix_fmts</a>[0];</div>
<div class="line"> <span class="comment">/* video time_base can be set to whatever is handy and supported by encoder */</span></div>
<div class="line"> enc_ctx-><a name="a41"></a><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a> = dec_ctx-><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a>;</div>
<div class="line"> } <span class="keywordflow">else</span> {</div>
<div class="line"> enc_ctx-><a name="a42"></a><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a> = dec_ctx-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>;</div>
<div class="line"> enc_ctx-><a name="a43"></a><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a> = dec_ctx-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a>;</div>
<div class="line"> enc_ctx-><a name="a44"></a><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a> = <a name="a45"></a><a class="code" href="group__channel__mask__c.html#gac95619abeb32e4a3daa18e3ff3419380">av_get_channel_layout_nb_channels</a>(enc_ctx-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a>);</div>
<div class="line"> <span class="comment">/* take first format from list of supported formats */</span></div>
<div class="line"> enc_ctx-><a name="a46"></a><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a> = encoder-><a name="a47"></a><a class="code" href="structAVCodec.html#aac19f4c45370f715412ad5c7b78daacf">sample_fmts</a>[0];</div>
<div class="line"> enc_ctx-><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a> = (<a name="_a48"></a><a class="code" href="structAVRational.html">AVRational</a>){1, enc_ctx-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>};</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* Third parameter can be used to pass settings to encoder */</span></div>
<div class="line"> ret = <a class="code" href="group__lavc__core.html#ga11f785a188d7d9df71621001465b0f1d">avcodec_open2</a>(enc_ctx, encoder, NULL);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Cannot open video encoder for stream #%u\n"</span>, i);</div>
<div class="line"> <span class="keywordflow">return</span> ret;</div>
<div class="line"> }</div>
<div class="line"> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (dec_ctx-><a class="code" href="structAVCodecContext.html#a3f99ca3115c44e6d7772c9384faf15e6">codec_type</a> == <a name="a49"></a><a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48afdadbd6c4f612c59f6b6c7c6f84fd347">AVMEDIA_TYPE_UNKNOWN</a>) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#ga96970a2980bf6ad28cd403e7dc52d6c5">AV_LOG_FATAL</a>, <span class="stringliteral">"Elementary stream #%d is of unknown type, cannot proceed\n"</span>, i);</div>
<div class="line"> <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#gaa6e5781e75b15ce44b0baea170c98a45">AVERROR_INVALIDDATA</a>;</div>
<div class="line"> } <span class="keywordflow">else</span> {</div>
<div class="line"> <span class="comment">/* if this stream must be remuxed */</span></div>
<div class="line"> ret = <a name="a50"></a><a class="code" href="group__lavc__core.html#ga3933b21b9dcb9173df3e56673b7a7d76">avcodec_copy_context</a>(ofmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[i]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>,</div>
<div class="line"> ifmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[i]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Copying stream context failed\n"</span>);</div>
<div class="line"> <span class="keywordflow">return</span> ret;</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> (ofmt_ctx-><a name="a51"></a><a class="code" href="structAVFormatContext.html#a20d80ac07e38ff5c268d15aaf2798b98">oformat</a>-><a name="a52"></a><a class="code" href="structAVOutputFormat.html#aad55a00e728a020c1dcfaaf695320445">flags</a> & <a name="a53"></a><a class="code" href="avformat_8h.html#ab203c7b734e9c31b7c37d34f6e2c6aef">AVFMT_GLOBALHEADER</a>)</div>
<div class="line"> enc_ctx-><a name="a54"></a><a class="code" href="structAVCodecContext.html#abb01e291550fa3fb96188af4d494587e">flags</a> |= <a name="a55"></a><a class="code" href="group__lavc__core.html#ga9ed82634c59b339786575827c47a8f68">AV_CODEC_FLAG_GLOBAL_HEADER</a>;</div>
<div class="line"></div>
<div class="line"> }</div>
<div class="line"> <a class="code" href="group__lavf__misc.html#gae2645941f2dc779c307eb6314fd39f10">av_dump_format</a>(ofmt_ctx, 0, filename, 1);</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> (!(ofmt_ctx-><a class="code" href="structAVFormatContext.html#a20d80ac07e38ff5c268d15aaf2798b98">oformat</a>-><a class="code" href="structAVOutputFormat.html#aad55a00e728a020c1dcfaaf695320445">flags</a> & <a name="a56"></a><a class="code" href="avformat_8h.html#a752cce390d480521919aa5d8be24ac0b">AVFMT_NOFILE</a>)) {</div>
<div class="line"> ret = <a name="a57"></a><a class="code" href="avio_8h.html#a371a670112abc5f3e15bc570da076301">avio_open</a>(&ofmt_ctx-><a name="a58"></a><a class="code" href="structAVFormatContext.html#a1e7324262b6b78522e52064daaa7bc87">pb</a>, filename, <a name="a59"></a><a class="code" href="avio_8h.html#a5c9308f296545a8f3b7687d277a6dabc">AVIO_FLAG_WRITE</a>);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Could not open output file '%s'"</span>, filename);</div>
<div class="line"> <span class="keywordflow">return</span> ret;</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* init muxer, write output file header */</span></div>
<div class="line"> ret = <a name="a60"></a><a class="code" href="group__lavf__encoding.html#ga18b7b10bb5b94c4842de18166bc677cb">avformat_write_header</a>(ofmt_ctx, NULL);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Error occurred when opening output file\n"</span>);</div>
<div class="line"> <span class="keywordflow">return</span> ret;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">int</span> <a name="a61"></a><a class="code" href="transcoding_8c.html#a54ad76df48ef886861a2f12bc7a9e7e4">init_filter</a>(<a class="code" href="structFilteringContext.html">FilteringContext</a>* fctx, <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *dec_ctx,</div>
<div class="line"> <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *enc_ctx, <span class="keyword">const</span> <span class="keywordtype">char</span> *filter_spec)</div>
<div class="line">{</div>
<div class="line"> <span class="keywordtype">char</span> args[512];</div>
<div class="line"> <span class="keywordtype">int</span> ret = 0;</div>
<div class="line"> <a name="_a62"></a><a class="code" href="structAVFilter.html">AVFilter</a> *buffersrc = NULL;</div>
<div class="line"> <a class="code" href="structAVFilter.html">AVFilter</a> *buffersink = NULL;</div>
<div class="line"> <a class="code" href="structAVFilterContext.html">AVFilterContext</a> *<a name="a63"></a><a class="code" href="filtering__audio_8c.html#a8dce1714a267758c056947f105f66a82">buffersrc_ctx</a> = NULL;</div>
<div class="line"> <a class="code" href="structAVFilterContext.html">AVFilterContext</a> *<a name="a64"></a><a class="code" href="filtering__audio_8c.html#a5a75197a9aaa609af34cfc0d199acbda">buffersink_ctx</a> = NULL;</div>
<div class="line"> <a name="_a65"></a><a class="code" href="structAVFilterInOut.html">AVFilterInOut</a> *outputs = <a name="a66"></a><a class="code" href="group__lavfi.html#ga6e1c2931e15eb4283c59c6ccc8b83919">avfilter_inout_alloc</a>();</div>
<div class="line"> <a class="code" href="structAVFilterInOut.html">AVFilterInOut</a> *inputs = <a class="code" href="group__lavfi.html#ga6e1c2931e15eb4283c59c6ccc8b83919">avfilter_inout_alloc</a>();</div>
<div class="line"> <a class="code" href="structAVFilterGraph.html">AVFilterGraph</a> *<a name="a67"></a><a class="code" href="filtering__audio_8c.html#a36c24d3c84d08e2f5a69e7368c211412">filter_graph</a> = <a name="a68"></a><a class="code" href="group__lavfi.html#ga6c778454b86f845805ffd814b4ce51d4">avfilter_graph_alloc</a>();</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> (!outputs || !inputs || !filter_graph) {</div>
<div class="line"> ret = <a name="a69"></a><a class="code" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR</a>(ENOMEM);</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> (dec_ctx-><a class="code" href="structAVCodecContext.html#a3f99ca3115c44e6d7772c9384faf15e6">codec_type</a> == <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5">AVMEDIA_TYPE_VIDEO</a>) {</div>
<div class="line"> buffersrc = <a name="a70"></a><a class="code" href="group__lavfi.html#ga9c7f1b28f648fc72f2822ff7f14a007a">avfilter_get_by_name</a>(<span class="stringliteral">"buffer"</span>);</div>
<div class="line"> buffersink = <a class="code" href="group__lavfi.html#ga9c7f1b28f648fc72f2822ff7f14a007a">avfilter_get_by_name</a>(<span class="stringliteral">"buffersink"</span>);</div>
<div class="line"> <span class="keywordflow">if</span> (!buffersrc || !buffersink) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"filtering source or sink element not found\n"</span>);</div>
<div class="line"> ret = <a class="code" href="group__lavu__error.html#ga4ebaa288c7684a26a591c501208910e4">AVERROR_UNKNOWN</a>;</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> snprintf(args, <span class="keyword">sizeof</span>(args),</div>
<div class="line"> <span class="stringliteral">"video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d"</span>,</div>
<div class="line"> dec_ctx-><a class="code" href="structAVCodecContext.html#a0d8f46461754e8abea0847dcbc41b956">width</a>, dec_ctx-><a class="code" href="structAVCodecContext.html#a0449afd803eb107bd4dbc8b5ea22e363">height</a>, dec_ctx-><a class="code" href="structAVCodecContext.html#a0425c77b3d06d71e5db88b1d7e1b37f2">pix_fmt</a>,</div>
<div class="line"> dec_ctx-><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a>.<a name="a71"></a><a class="code" href="structAVRational.html#ae9a98c10a301c5e937095105b6f0fdb9">num</a>, dec_ctx-><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a>.<a name="a72"></a><a class="code" href="structAVRational.html#aee46bdac67d965ac0a4204e753f910c3">den</a>,</div>
<div class="line"> dec_ctx-><a class="code" href="structAVCodecContext.html#a5252d34fbce300228d4dbda19a8c3293">sample_aspect_ratio</a>.<a class="code" href="structAVRational.html#ae9a98c10a301c5e937095105b6f0fdb9">num</a>,</div>
<div class="line"> dec_ctx-><a class="code" href="structAVCodecContext.html#a5252d34fbce300228d4dbda19a8c3293">sample_aspect_ratio</a>.<a class="code" href="structAVRational.html#aee46bdac67d965ac0a4204e753f910c3">den</a>);</div>
<div class="line"></div>
<div class="line"> ret = <a name="a73"></a><a class="code" href="group__lavfi.html#gac0788a9ab6966dba9318b5d5c7524fea">avfilter_graph_create_filter</a>(&buffersrc_ctx, buffersrc, <span class="stringliteral">"in"</span>,</div>
<div class="line"> args, NULL, filter_graph);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Cannot create buffer source\n"</span>);</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> ret = <a class="code" href="group__lavfi.html#gac0788a9ab6966dba9318b5d5c7524fea">avfilter_graph_create_filter</a>(&buffersink_ctx, buffersink, <span class="stringliteral">"out"</span>,</div>
<div class="line"> NULL, NULL, filter_graph);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Cannot create buffer sink\n"</span>);</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> ret = <a name="a74"></a><a class="code" href="group__opt__set__funcs.html#ga6c32155fd8a96bed2f8cf5ebc030dadf">av_opt_set_bin</a>(buffersink_ctx, <span class="stringliteral">"pix_fmts"</span>,</div>
<div class="line"> (uint8_t*)&enc_ctx-><a class="code" href="structAVCodecContext.html#a0425c77b3d06d71e5db88b1d7e1b37f2">pix_fmt</a>, <span class="keyword">sizeof</span>(enc_ctx-><a class="code" href="structAVCodecContext.html#a0425c77b3d06d71e5db88b1d7e1b37f2">pix_fmt</a>),</div>
<div class="line"> <a name="a75"></a><a class="code" href="group__avoptions.html#ga25801ba4fc9b5313eb33ec84e082dd72">AV_OPT_SEARCH_CHILDREN</a>);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Cannot set output pixel format\n"</span>);</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (dec_ctx-><a class="code" href="structAVCodecContext.html#a3f99ca3115c44e6d7772c9384faf15e6">codec_type</a> == <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a7b4e33b8f30ac94d34ce8d9f7c33927a">AVMEDIA_TYPE_AUDIO</a>) {</div>
<div class="line"> buffersrc = <a class="code" href="group__lavfi.html#ga9c7f1b28f648fc72f2822ff7f14a007a">avfilter_get_by_name</a>(<span class="stringliteral">"abuffer"</span>);</div>
<div class="line"> buffersink = <a class="code" href="group__lavfi.html#ga9c7f1b28f648fc72f2822ff7f14a007a">avfilter_get_by_name</a>(<span class="stringliteral">"abuffersink"</span>);</div>
<div class="line"> <span class="keywordflow">if</span> (!buffersrc || !buffersink) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"filtering source or sink element not found\n"</span>);</div>
<div class="line"> ret = <a class="code" href="group__lavu__error.html#ga4ebaa288c7684a26a591c501208910e4">AVERROR_UNKNOWN</a>;</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> (!dec_ctx-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a>)</div>
<div class="line"> dec_ctx-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a> =</div>
<div class="line"> <a name="a76"></a><a class="code" href="group__channel__mask__c.html#gacb84f3e93a583e1f84a5283162a606a2">av_get_default_channel_layout</a>(dec_ctx-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a>);</div>
<div class="line"> snprintf(args, <span class="keyword">sizeof</span>(args),</div>
<div class="line"> <span class="stringliteral">"time_base=%d/%d:sample_rate=%d:sample_fmt=%s:channel_layout=0x%"</span>PRIx64,</div>
<div class="line"> dec_ctx-><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a>.<a class="code" href="structAVRational.html#ae9a98c10a301c5e937095105b6f0fdb9">num</a>, dec_ctx-><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a>.<a class="code" href="structAVRational.html#aee46bdac67d965ac0a4204e753f910c3">den</a>, dec_ctx-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>,</div>
<div class="line"> <a name="a77"></a><a class="code" href="group__lavu__sampfmts.html#ga31b9d149b2de9821a65f4f5612970838">av_get_sample_fmt_name</a>(dec_ctx-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>),</div>
<div class="line"> dec_ctx-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a>);</div>
<div class="line"> ret = <a class="code" href="group__lavfi.html#gac0788a9ab6966dba9318b5d5c7524fea">avfilter_graph_create_filter</a>(&buffersrc_ctx, buffersrc, <span class="stringliteral">"in"</span>,</div>
<div class="line"> args, NULL, filter_graph);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Cannot create audio buffer source\n"</span>);</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> ret = <a class="code" href="group__lavfi.html#gac0788a9ab6966dba9318b5d5c7524fea">avfilter_graph_create_filter</a>(&buffersink_ctx, buffersink, <span class="stringliteral">"out"</span>,</div>
<div class="line"> NULL, NULL, filter_graph);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Cannot create audio buffer sink\n"</span>);</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> ret = <a class="code" href="group__opt__set__funcs.html#ga6c32155fd8a96bed2f8cf5ebc030dadf">av_opt_set_bin</a>(buffersink_ctx, <span class="stringliteral">"sample_fmts"</span>,</div>
<div class="line"> (uint8_t*)&enc_ctx-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>, <span class="keyword">sizeof</span>(enc_ctx-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>),</div>
<div class="line"> <a class="code" href="group__avoptions.html#ga25801ba4fc9b5313eb33ec84e082dd72">AV_OPT_SEARCH_CHILDREN</a>);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Cannot set output sample format\n"</span>);</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> ret = <a class="code" href="group__opt__set__funcs.html#ga6c32155fd8a96bed2f8cf5ebc030dadf">av_opt_set_bin</a>(buffersink_ctx, <span class="stringliteral">"channel_layouts"</span>,</div>
<div class="line"> (uint8_t*)&enc_ctx-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a>,</div>
<div class="line"> <span class="keyword">sizeof</span>(enc_ctx-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a>), <a class="code" href="group__avoptions.html#ga25801ba4fc9b5313eb33ec84e082dd72">AV_OPT_SEARCH_CHILDREN</a>);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Cannot set output channel layout\n"</span>);</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> ret = <a class="code" href="group__opt__set__funcs.html#ga6c32155fd8a96bed2f8cf5ebc030dadf">av_opt_set_bin</a>(buffersink_ctx, <span class="stringliteral">"sample_rates"</span>,</div>
<div class="line"> (uint8_t*)&enc_ctx-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>, <span class="keyword">sizeof</span>(enc_ctx-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>),</div>
<div class="line"> <a class="code" href="group__avoptions.html#ga25801ba4fc9b5313eb33ec84e082dd72">AV_OPT_SEARCH_CHILDREN</a>);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Cannot set output sample rate\n"</span>);</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"> } <span class="keywordflow">else</span> {</div>
<div class="line"> ret = <a class="code" href="group__lavu__error.html#ga4ebaa288c7684a26a591c501208910e4">AVERROR_UNKNOWN</a>;</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* Endpoints for the filter graph. */</span></div>
<div class="line"> outputs-><a name="a78"></a><a class="code" href="structAVFilterInOut.html#a88afecac258f51aab7e9a9db9e7a4d58">name</a> = <a name="a79"></a><a class="code" href="group__lavu__mem.html#ga7c352f4cff02184f005323691375fea9">av_strdup</a>(<span class="stringliteral">"in"</span>);</div>
<div class="line"> outputs-><a name="a80"></a><a class="code" href="structAVFilterInOut.html#a3227857d0b955b639f4950d13e4e6f40">filter_ctx</a> = <a class="code" href="filtering__audio_8c.html#a8dce1714a267758c056947f105f66a82">buffersrc_ctx</a>;</div>
<div class="line"> outputs-><a name="a81"></a><a class="code" href="structAVFilterInOut.html#a386ff90d40aa22f5612dd5eca734ed48">pad_idx</a> = 0;</div>
<div class="line"> outputs-><a name="a82"></a><a class="code" href="structAVFilterInOut.html#af8c8cf9ffb650974d19e791f5bb7cf33">next</a> = NULL;</div>
<div class="line"></div>
<div class="line"> inputs-><a class="code" href="structAVFilterInOut.html#a88afecac258f51aab7e9a9db9e7a4d58">name</a> = <a class="code" href="group__lavu__mem.html#ga7c352f4cff02184f005323691375fea9">av_strdup</a>(<span class="stringliteral">"out"</span>);</div>
<div class="line"> inputs-><a class="code" href="structAVFilterInOut.html#a3227857d0b955b639f4950d13e4e6f40">filter_ctx</a> = <a class="code" href="filtering__audio_8c.html#a5a75197a9aaa609af34cfc0d199acbda">buffersink_ctx</a>;</div>
<div class="line"> inputs-><a class="code" href="structAVFilterInOut.html#a386ff90d40aa22f5612dd5eca734ed48">pad_idx</a> = 0;</div>
<div class="line"> inputs-><a class="code" href="structAVFilterInOut.html#af8c8cf9ffb650974d19e791f5bb7cf33">next</a> = NULL;</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> (!outputs-><a class="code" href="structAVFilterInOut.html#a88afecac258f51aab7e9a9db9e7a4d58">name</a> || !inputs-><a class="code" href="structAVFilterInOut.html#a88afecac258f51aab7e9a9db9e7a4d58">name</a>) {</div>
<div class="line"> ret = <a class="code" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR</a>(ENOMEM);</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> ((ret = <a name="a83"></a><a class="code" href="group__lavfi.html#ga34f4ff420bd58da6747a3ff1fbedd001">avfilter_graph_parse_ptr</a>(filter_graph, filter_spec,</div>
<div class="line"> &inputs, &outputs, NULL)) < 0)</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> ((ret = <a name="a84"></a><a class="code" href="group__lavfi.html#ga1896c46b7bc6ff1bdb1a4815faa9ad07">avfilter_graph_config</a>(filter_graph, NULL)) < 0)</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* Fill FilteringContext */</span></div>
<div class="line"> fctx-><a class="code" href="structFilteringContext.html#a25c500d3728df3a9f904e6d86cf55f11">buffersrc_ctx</a> = <a class="code" href="filtering__audio_8c.html#a8dce1714a267758c056947f105f66a82">buffersrc_ctx</a>;</div>
<div class="line"> fctx-><a class="code" href="structFilteringContext.html#a4476c9e6fb492172c909ae4a47c47233">buffersink_ctx</a> = <a class="code" href="filtering__audio_8c.html#a5a75197a9aaa609af34cfc0d199acbda">buffersink_ctx</a>;</div>
<div class="line"> fctx-><a class="code" href="structFilteringContext.html#aaf35e44d4e6100095b1db444e2d316cd">filter_graph</a> = <a class="code" href="filtering__audio_8c.html#a36c24d3c84d08e2f5a69e7368c211412">filter_graph</a>;</div>
<div class="line"></div>
<div class="line">end:</div>
<div class="line"> <a name="a85"></a><a class="code" href="group__lavfi.html#ga294500a9856260eb1552354fd9d9a6c4">avfilter_inout_free</a>(&inputs);</div>
<div class="line"> <a class="code" href="group__lavfi.html#ga294500a9856260eb1552354fd9d9a6c4">avfilter_inout_free</a>(&outputs);</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">return</span> ret;</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">int</span> <a name="a86"></a><a class="code" href="transcoding_8c.html#a05c93a3c60f2fc12e3fb7884be1128d6">init_filters</a>(<span class="keywordtype">void</span>)</div>
<div class="line">{</div>
<div class="line"> <span class="keyword">const</span> <span class="keywordtype">char</span> *filter_spec;</div>
<div class="line"> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i;</div>
<div class="line"> <span class="keywordtype">int</span> ret;</div>
<div class="line"> filter_ctx = <a name="a87"></a><a class="code" href="group__lavu__mem.html#gab62b093b46dce5fe4e3e1d58bdb255da">av_malloc_array</a>(ifmt_ctx-><a class="code" href="structAVFormatContext.html#a0b748d924898b08b89ff4974afd17285">nb_streams</a>, <span class="keyword">sizeof</span>(*filter_ctx));</div>
<div class="line"> <span class="keywordflow">if</span> (!filter_ctx)</div>
<div class="line"> <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR</a>(ENOMEM);</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">for</span> (i = 0; i < ifmt_ctx-><a class="code" href="structAVFormatContext.html#a0b748d924898b08b89ff4974afd17285">nb_streams</a>; i++) {</div>
<div class="line"> filter_ctx[i].<a class="code" href="structFilteringContext.html#a25c500d3728df3a9f904e6d86cf55f11">buffersrc_ctx</a> = NULL;</div>
<div class="line"> filter_ctx[i].<a class="code" href="structFilteringContext.html#a4476c9e6fb492172c909ae4a47c47233">buffersink_ctx</a> = NULL;</div>
<div class="line"> filter_ctx[i].<a class="code" href="structFilteringContext.html#aaf35e44d4e6100095b1db444e2d316cd">filter_graph</a> = NULL;</div>
<div class="line"> <span class="keywordflow">if</span> (!(ifmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[i]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>-><a class="code" href="structAVCodecContext.html#a3f99ca3115c44e6d7772c9384faf15e6">codec_type</a> == <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a7b4e33b8f30ac94d34ce8d9f7c33927a">AVMEDIA_TYPE_AUDIO</a></div>
<div class="line"> || ifmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[i]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>-><a class="code" href="structAVCodecContext.html#a3f99ca3115c44e6d7772c9384faf15e6">codec_type</a> == <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5">AVMEDIA_TYPE_VIDEO</a>))</div>
<div class="line"> <span class="keywordflow">continue</span>;</div>
<div class="line"></div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> (ifmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[i]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>-><a class="code" href="structAVCodecContext.html#a3f99ca3115c44e6d7772c9384faf15e6">codec_type</a> == <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5">AVMEDIA_TYPE_VIDEO</a>)</div>
<div class="line"> filter_spec = <span class="stringliteral">"null"</span>; <span class="comment">/* passthrough (dummy) filter for video */</span></div>
<div class="line"> <span class="keywordflow">else</span></div>
<div class="line"> filter_spec = <span class="stringliteral">"anull"</span>; <span class="comment">/* passthrough (dummy) filter for audio */</span></div>
<div class="line"> ret = <a class="code" href="transcoding_8c.html#a54ad76df48ef886861a2f12bc7a9e7e4">init_filter</a>(&filter_ctx[i], ifmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[i]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>,</div>
<div class="line"> ofmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[i]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>, filter_spec);</div>
<div class="line"> <span class="keywordflow">if</span> (ret)</div>
<div class="line"> <span class="keywordflow">return</span> ret;</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">int</span> <a name="a88"></a><a class="code" href="transcoding_8c.html#afb371e273a9d2e9cc0539a6453913533">encode_write_frame</a>(<a name="_a89"></a><a class="code" href="structAVFrame.html">AVFrame</a> *filt_frame, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> stream_index, <span class="keywordtype">int</span> *got_frame) {</div>
<div class="line"> <span class="keywordtype">int</span> ret;</div>
<div class="line"> <span class="keywordtype">int</span> got_frame_local;</div>
<div class="line"> <a name="_a90"></a><a class="code" href="structAVPacket.html">AVPacket</a> enc_pkt;</div>
<div class="line"> int (*enc_func)(<a class="code" href="structAVCodecContext.html">AVCodecContext</a> *, <a class="code" href="structAVPacket.html">AVPacket</a> *, <span class="keyword">const</span> <a class="code" href="structAVFrame.html">AVFrame</a> *, <span class="keywordtype">int</span> *) =</div>
<div class="line"> (ifmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[stream_index]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>-><a class="code" href="structAVCodecContext.html#a3f99ca3115c44e6d7772c9384faf15e6">codec_type</a> ==</div>
<div class="line"> <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5">AVMEDIA_TYPE_VIDEO</a>) ? <a name="a91"></a><a class="code" href="group__lavc__encoding.html#gaa2dc9e9ea2567ebb2801a08153c7306b">avcodec_encode_video2</a> : <a name="a92"></a><a class="code" href="group__lavc__encoding.html#ga93a49fbd0973b216dcb8a8c5dffe1d82">avcodec_encode_audio2</a>;</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> (!got_frame)</div>
<div class="line"> got_frame = &got_frame_local;</div>
<div class="line"></div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a name="a93"></a><a class="code" href="group__lavu__log__constants.html#gad172eacfed8653e454c6fdcbe53baab3">AV_LOG_INFO</a>, <span class="stringliteral">"Encoding frame\n"</span>);</div>
<div class="line"> <span class="comment">/* encode filtered frame */</span></div>
<div class="line"> enc_pkt.<a name="a94"></a><a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a> = NULL;</div>
<div class="line"> enc_pkt.<a name="a95"></a><a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a> = 0;</div>
<div class="line"> <a name="a96"></a><a class="code" href="group__lavc__packet.html#gac9cb9756175b96e7441575803757fb73">av_init_packet</a>(&enc_pkt);</div>
<div class="line"> ret = enc_func(ofmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[stream_index]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>, &enc_pkt,</div>
<div class="line"> filt_frame, got_frame);</div>
<div class="line"> <a name="a97"></a><a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&filt_frame);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0)</div>
<div class="line"> <span class="keywordflow">return</span> ret;</div>
<div class="line"> <span class="keywordflow">if</span> (!(*got_frame))</div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* prepare packet for muxing */</span></div>
<div class="line"> enc_pkt.<a name="a98"></a><a class="code" href="structAVPacket.html#a0d1cb9b5a32b00fb6edc81ea3aae2a49">stream_index</a> = stream_index;</div>
<div class="line"> <a name="a99"></a><a class="code" href="group__lavc__packet.html#gae5c86e4d93f6e7aa62ef2c60763ea67e">av_packet_rescale_ts</a>(&enc_pkt,</div>
<div class="line"> ofmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[stream_index]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>-><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a>,</div>
<div class="line"> ofmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[stream_index]-><a name="a100"></a><a class="code" href="structAVStream.html#a9db755451f14e2bf590d4b85d82b32e6">time_base</a>);</div>
<div class="line"></div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a name="a101"></a><a class="code" href="group__lavu__log__constants.html#ga5b7221c3afd06848486776bd834a58a5">AV_LOG_DEBUG</a>, <span class="stringliteral">"Muxing frame\n"</span>);</div>
<div class="line"> <span class="comment">/* mux encoded frame */</span></div>
<div class="line"> ret = <a name="a102"></a><a class="code" href="group__lavf__encoding.html#ga37352ed2c63493c38219d935e71db6c1">av_interleaved_write_frame</a>(ofmt_ctx, &enc_pkt);</div>
<div class="line"> <span class="keywordflow">return</span> ret;</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">int</span> <a name="a103"></a><a class="code" href="transcoding_8c.html#a255192428438daf73b9f8060c0815712">filter_encode_write_frame</a>(AVFrame *<a name="a104"></a><a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> stream_index)</div>
<div class="line">{</div>
<div class="line"> <span class="keywordtype">int</span> ret;</div>
<div class="line"> AVFrame *filt_frame;</div>
<div class="line"></div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gad172eacfed8653e454c6fdcbe53baab3">AV_LOG_INFO</a>, <span class="stringliteral">"Pushing decoded frame to filters\n"</span>);</div>
<div class="line"> <span class="comment">/* push the decoded frame into the filtergraph */</span></div>
<div class="line"> ret = <a name="a105"></a><a class="code" href="group__lavfi__buffersrc.html#ga73ed90c3c3407f36e54d65f91faaaed9">av_buffersrc_add_frame_flags</a>(filter_ctx[stream_index].buffersrc_ctx,</div>
<div class="line"> frame, 0);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Error while feeding the filtergraph\n"</span>);</div>
<div class="line"> <span class="keywordflow">return</span> ret;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* pull filtered frames from the filtergraph */</span></div>
<div class="line"> <span class="keywordflow">while</span> (1) {</div>
<div class="line"> filt_frame = <a name="a106"></a><a class="code" href="group__lavu__frame.html#gac700017c5270c79c1e1befdeeb008b2f">av_frame_alloc</a>();</div>
<div class="line"> <span class="keywordflow">if</span> (!filt_frame) {</div>
<div class="line"> ret = <a class="code" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR</a>(ENOMEM);</div>
<div class="line"> <span class="keywordflow">break</span>;</div>
<div class="line"> }</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gad172eacfed8653e454c6fdcbe53baab3">AV_LOG_INFO</a>, <span class="stringliteral">"Pulling filtered frame from filters\n"</span>);</div>
<div class="line"> ret = <a name="a107"></a><a class="code" href="group__lavfi__buffersink.html#ga653228f4cbca427c654d844a5fc59cfa">av_buffersink_get_frame</a>(filter_ctx[stream_index].buffersink_ctx,</div>
<div class="line"> filt_frame);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <span class="comment">/* if no more frames for output - returns AVERROR(EAGAIN)</span></div>
<div class="line"><span class="comment"> * if flushed and no more frames for output - returns AVERROR_EOF</span></div>
<div class="line"><span class="comment"> * rewrite retcode to 0 to show it as normal procedure completion</span></div>
<div class="line"><span class="comment"> */</span></div>
<div class="line"> <span class="keywordflow">if</span> (ret == <a class="code" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR</a>(EAGAIN) || ret == <a name="a108"></a><a class="code" href="group__lavu__error.html#gab4faa0afdf35076914824200331defff">AVERROR_EOF</a>)</div>
<div class="line"> ret = 0;</div>
<div class="line"> <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&filt_frame);</div>
<div class="line"> <span class="keywordflow">break</span>;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> filt_frame-><a name="a109"></a><a class="code" href="structAVFrame.html#af9920fc3fbfa347b8943ae461b50d18b">pict_type</a> = <a name="a110"></a><a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea33183189d771e3325ccdd36fa980b6f6">AV_PICTURE_TYPE_NONE</a>;</div>
<div class="line"> ret = <a class="code" href="transcoding_8c.html#afb371e273a9d2e9cc0539a6453913533">encode_write_frame</a>(filt_frame, stream_index, NULL);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0)</div>
<div class="line"> <span class="keywordflow">break</span>;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">return</span> ret;</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">int</span> <a name="a111"></a><a class="code" href="transcoding_8c.html#ad55ba3d9c6ebe490eb8766a91b627d3e">flush_encoder</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> stream_index)</div>
<div class="line">{</div>
<div class="line"> <span class="keywordtype">int</span> ret;</div>
<div class="line"> <span class="keywordtype">int</span> got_frame;</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> (!(ofmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[stream_index]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>-><a name="a112"></a><a class="code" href="structAVCodecContext.html#a6e606effa68724cae2ef5cc05f7fd9cb">codec</a>-><a name="a113"></a><a class="code" href="structAVCodec.html#af51f7ff3dac8b730f46b9713e49a2518">capabilities</a> &</div>
<div class="line"> <a name="a114"></a><a class="code" href="group__lavc__core.html#ga3f55f5bcfbb12e06c7cb1195028855e6">AV_CODEC_CAP_DELAY</a>))</div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">while</span> (1) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gad172eacfed8653e454c6fdcbe53baab3">AV_LOG_INFO</a>, <span class="stringliteral">"Flushing stream #%u encoder\n"</span>, stream_index);</div>
<div class="line"> ret = <a class="code" href="transcoding_8c.html#afb371e273a9d2e9cc0539a6453913533">encode_write_frame</a>(NULL, stream_index, &got_frame);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0)</div>
<div class="line"> <span class="keywordflow">break</span>;</div>
<div class="line"> <span class="keywordflow">if</span> (!got_frame)</div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">return</span> ret;</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keywordtype">int</span> <a name="a115"></a><a class="code" href="transcoding_8c.html#a3c04138a5bfe5d72780bb7e82a18e627">main</a>(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> **argv)</div>
<div class="line">{</div>
<div class="line"> <span class="keywordtype">int</span> ret;</div>
<div class="line"> AVPacket packet = { .data = NULL, .size = 0 };</div>
<div class="line"> AVFrame *frame = NULL;</div>
<div class="line"> <span class="keyword">enum</span> <a class="code" href="group__lavu__misc.html#ga9a84bba4713dfced21a1a56163be1f48">AVMediaType</a> type;</div>
<div class="line"> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> stream_index;</div>
<div class="line"> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i;</div>
<div class="line"> <span class="keywordtype">int</span> got_frame;</div>
<div class="line"> int (*dec_func)(<a class="code" href="structAVCodecContext.html">AVCodecContext</a> *, AVFrame *, <span class="keywordtype">int</span> *, <span class="keyword">const</span> AVPacket *);</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> (argc != 3) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Usage: %s <input file> <output file>\n"</span>, argv[0]);</div>
<div class="line"> <span class="keywordflow">return</span> 1;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <a name="a116"></a><a class="code" href="group__lavf__core.html#ga917265caec45ef5a0646356ed1a507e3">av_register_all</a>();</div>
<div class="line"> <a name="a117"></a><a class="code" href="group__lavfi.html#ga2bf8f0a6e2599faf4bf97b04a5a25149">avfilter_register_all</a>();</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> ((ret = <a class="code" href="transcoding_8c.html#abd04bf1a933d4d2698482f4949c61fed">open_input_file</a>(argv[1])) < 0)</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> <span class="keywordflow">if</span> ((ret = <a class="code" href="transcoding_8c.html#ab6c33edf9a42e2f71594a7cdc6276407">open_output_file</a>(argv[2])) < 0)</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> <span class="keywordflow">if</span> ((ret = <a class="code" href="transcoding_8c.html#a05c93a3c60f2fc12e3fb7884be1128d6">init_filters</a>()) < 0)</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* read all packets */</span></div>
<div class="line"> <span class="keywordflow">while</span> (1) {</div>
<div class="line"> <span class="keywordflow">if</span> ((ret = <a name="a118"></a><a class="code" href="group__lavf__decoding.html#ga4fdb3084415a82e3810de6ee60e46a61">av_read_frame</a>(ifmt_ctx, &packet)) < 0)</div>
<div class="line"> <span class="keywordflow">break</span>;</div>
<div class="line"> stream_index = packet.<a class="code" href="structAVPacket.html#a0d1cb9b5a32b00fb6edc81ea3aae2a49">stream_index</a>;</div>
<div class="line"> type = ifmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[packet.<a class="code" href="structAVPacket.html#a0d1cb9b5a32b00fb6edc81ea3aae2a49">stream_index</a>]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>-><a class="code" href="structAVCodecContext.html#a3f99ca3115c44e6d7772c9384faf15e6">codec_type</a>;</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#ga5b7221c3afd06848486776bd834a58a5">AV_LOG_DEBUG</a>, <span class="stringliteral">"Demuxer gave frame of stream_index %u\n"</span>,</div>
<div class="line"> stream_index);</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> (filter_ctx[stream_index].filter_graph) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#ga5b7221c3afd06848486776bd834a58a5">AV_LOG_DEBUG</a>, <span class="stringliteral">"Going to reencode&filter the frame\n"</span>);</div>
<div class="line"> frame = <a class="code" href="group__lavu__frame.html#gac700017c5270c79c1e1befdeeb008b2f">av_frame_alloc</a>();</div>
<div class="line"> <span class="keywordflow">if</span> (!frame) {</div>
<div class="line"> ret = <a class="code" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR</a>(ENOMEM);</div>
<div class="line"> <span class="keywordflow">break</span>;</div>
<div class="line"> }</div>
<div class="line"> <a class="code" href="group__lavc__packet.html#gae5c86e4d93f6e7aa62ef2c60763ea67e">av_packet_rescale_ts</a>(&packet,</div>
<div class="line"> ifmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[stream_index]-><a class="code" href="structAVStream.html#a9db755451f14e2bf590d4b85d82b32e6">time_base</a>,</div>
<div class="line"> ifmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[stream_index]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>-><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a>);</div>
<div class="line"> dec_func = (type == <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5">AVMEDIA_TYPE_VIDEO</a>) ? <a name="a119"></a><a class="code" href="group__lavc__decoding.html#ga99ee61b6dcffb7817a275d39da58cc74">avcodec_decode_video2</a> :</div>
<div class="line"> <a name="a120"></a><a class="code" href="group__lavc__decoding.html#ga834bb1b062fbcc2de4cf7fb93f154a3e">avcodec_decode_audio4</a>;</div>
<div class="line"> ret = dec_func(ifmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[stream_index]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>, frame,</div>
<div class="line"> &got_frame, &packet);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&frame);</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Decoding failed\n"</span>);</div>
<div class="line"> <span class="keywordflow">break</span>;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> (got_frame) {</div>
<div class="line"> frame-><a name="a121"></a><a class="code" href="structAVFrame.html#a0452833e3ab6ddd7acbf82817a7818a4">pts</a> = <a name="a122"></a><a class="code" href="group__lavu__frame.html#gacb9d9082c10e625e51a68caceabd4458">av_frame_get_best_effort_timestamp</a>(frame);</div>
<div class="line"> ret = <a class="code" href="transcoding_8c.html#a255192428438daf73b9f8060c0815712">filter_encode_write_frame</a>(frame, stream_index);</div>
<div class="line"> <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&frame);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0)</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> } <span class="keywordflow">else</span> {</div>
<div class="line"> <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&frame);</div>
<div class="line"> }</div>
<div class="line"> } <span class="keywordflow">else</span> {</div>
<div class="line"> <span class="comment">/* remux this frame without reencoding */</span></div>
<div class="line"> <a class="code" href="group__lavc__packet.html#gae5c86e4d93f6e7aa62ef2c60763ea67e">av_packet_rescale_ts</a>(&packet,</div>
<div class="line"> ifmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[stream_index]-><a class="code" href="structAVStream.html#a9db755451f14e2bf590d4b85d82b32e6">time_base</a>,</div>
<div class="line"> ofmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[stream_index]-><a class="code" href="structAVStream.html#a9db755451f14e2bf590d4b85d82b32e6">time_base</a>);</div>
<div class="line"></div>
<div class="line"> ret = <a class="code" href="group__lavf__encoding.html#ga37352ed2c63493c38219d935e71db6c1">av_interleaved_write_frame</a>(ofmt_ctx, &packet);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0)</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"> <a name="a123"></a><a class="code" href="group__lavc__packet.html#ga63d5a489b419bd5d45cfd09091cbcbc2">av_packet_unref</a>(&packet);</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* flush filters and encoders */</span></div>
<div class="line"> <span class="keywordflow">for</span> (i = 0; i < ifmt_ctx-><a class="code" href="structAVFormatContext.html#a0b748d924898b08b89ff4974afd17285">nb_streams</a>; i++) {</div>
<div class="line"> <span class="comment">/* flush filter */</span></div>
<div class="line"> <span class="keywordflow">if</span> (!filter_ctx[i].filter_graph)</div>
<div class="line"> <span class="keywordflow">continue</span>;</div>
<div class="line"> ret = <a class="code" href="transcoding_8c.html#a255192428438daf73b9f8060c0815712">filter_encode_write_frame</a>(NULL, i);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Flushing filter failed\n"</span>);</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* flush encoder */</span></div>
<div class="line"> ret = <a class="code" href="transcoding_8c.html#ad55ba3d9c6ebe490eb8766a91b627d3e">flush_encoder</a>(i);</div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Flushing encoder failed\n"</span>);</div>
<div class="line"> <span class="keywordflow">goto</span> end;</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"></div>
<div class="line"> <a name="a124"></a><a class="code" href="group__lavf__encoding.html#ga7f14007e7dc8f481f054b21614dfec13">av_write_trailer</a>(ofmt_ctx);</div>
<div class="line">end:</div>
<div class="line"> <a class="code" href="group__lavc__packet.html#ga63d5a489b419bd5d45cfd09091cbcbc2">av_packet_unref</a>(&packet);</div>
<div class="line"> <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&frame);</div>
<div class="line"> <span class="keywordflow">for</span> (i = 0; i < ifmt_ctx-><a class="code" href="structAVFormatContext.html#a0b748d924898b08b89ff4974afd17285">nb_streams</a>; i++) {</div>
<div class="line"> <a name="a125"></a><a class="code" href="group__lavc__core.html#gaf4daa92361efb3523ef5afeb0b54077f">avcodec_close</a>(ifmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[i]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>);</div>
<div class="line"> <span class="keywordflow">if</span> (ofmt_ctx && ofmt_ctx-><a class="code" href="structAVFormatContext.html#a0b748d924898b08b89ff4974afd17285">nb_streams</a> > i && ofmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[i] && ofmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[i]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>)</div>
<div class="line"> <a class="code" href="group__lavc__core.html#gaf4daa92361efb3523ef5afeb0b54077f">avcodec_close</a>(ofmt_ctx-><a class="code" href="structAVFormatContext.html#acfefb6b6cf21e87a0dcbd1a547ba2348">streams</a>[i]-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>);</div>
<div class="line"> <span class="keywordflow">if</span> (filter_ctx && filter_ctx[i].filter_graph)</div>
<div class="line"> <a name="a126"></a><a class="code" href="group__lavfi.html#ga871684449dac05050df238a18d0d493b">avfilter_graph_free</a>(&filter_ctx[i].filter_graph);</div>
<div class="line"> }</div>
<div class="line"> <a name="a127"></a><a class="code" href="group__lavu__mem.html#ga0c9096f498624c525aa2315b8a20c411">av_free</a>(filter_ctx);</div>
<div class="line"> <a name="a128"></a><a class="code" href="group__lavf__decoding.html#gae804b99aec044690162b8b9b110236a4">avformat_close_input</a>(&ifmt_ctx);</div>
<div class="line"> <span class="keywordflow">if</span> (ofmt_ctx && !(ofmt_ctx-><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#a752cce390d480521919aa5d8be24ac0b">AVFMT_NOFILE</a>))</div>
<div class="line"> <a name="a129"></a><a class="code" href="avio_8h.html#ae118a1f37f1e48617609ead9910aac15">avio_closep</a>(&ofmt_ctx-><a class="code" href="structAVFormatContext.html#a1e7324262b6b78522e52064daaa7bc87">pb</a>);</div>
<div class="line"> <a name="a130"></a><a class="code" href="group__lavf__core.html#gac2990b13b68e831a408fce8e1d0d6445">avformat_free_context</a>(ofmt_ctx);</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">if</span> (ret < 0)</div>
<div class="line"> <a class="code" href="group__lavu__log.html#gabd386ffd4b27637cf34e98d5d1a6e8ae">av_log</a>(NULL, <a class="code" href="group__lavu__log__constants.html#gaffe151ff4cd8a24b2e77ac8d9616c85c">AV_LOG_ERROR</a>, <span class="stringliteral">"Error occurred: %s\n"</span>, <a name="a131"></a><a class="code" href="group__lavu__error.html#gac4f6e109c242c81aeee21868d3f35e12">av_err2str</a>(ret));</div>
<div class="line"></div>
<div class="line"> <span class="keywordflow">return</span> ret ? 1 : 0;</div>
<div class="line">}</div>
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