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showbox-public-14
showbox-public-14 / ffmpeg-doc deb
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 <span id="projectnumber">3.0.2</span>
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<div class="title">Encoding<div class="ingroups"><a class="el" href="group__libavc.html">Encoding/Decoding Library</a></div></div> </div>
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Data Structures</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structRcOverride.html">RcOverride</a></td></tr>
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Macros</h2></td></tr>
<tr class="memitem:ga4fde50e2cad4cf3d66d882a7078aeab4"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__encoding.html#ga4fde50e2cad4cf3d66d882a7078aeab4">AV_INPUT_BUFFER_MIN_SIZE</a>   16384</td></tr>
<tr class="memdesc:ga4fde50e2cad4cf3d66d882a7078aeab4"><td class="mdescLeft"> </td><td class="mdescRight">minimum encoding buffer size Used to avoid some checks during header writing. <a href="#ga4fde50e2cad4cf3d66d882a7078aeab4">More...</a><br/></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="enum-members"></a>
Enumerations</h2></td></tr>
<tr class="memitem:ga09b261f1bce5161af3485cb3302edd27"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__encoding.html#ga09b261f1bce5161af3485cb3302edd27">Motion_Est_ID</a> { <br/>
  <a class="el" href="group__lavc__encoding.html#gga09b261f1bce5161af3485cb3302edd27a93dc3282c22808d298c81bfde3882c42">ME_ZERO</a> = 1,
<a class="el" href="group__lavc__encoding.html#gga09b261f1bce5161af3485cb3302edd27a84208f4e6c361aaf87ac0c0f71116431">ME_FULL</a>,
<a class="el" href="group__lavc__encoding.html#gga09b261f1bce5161af3485cb3302edd27a712da9e85272e6bc8d73d897e40e8ab8">ME_LOG</a>,
<a class="el" href="group__lavc__encoding.html#gga09b261f1bce5161af3485cb3302edd27ab9f980e93b9500d67b1308ad0e9ce72a">ME_PHODS</a>,
<br/>
  <a class="el" href="group__lavc__encoding.html#gga09b261f1bce5161af3485cb3302edd27a47a2cf1ba9719d733ff2c0c0fc6e3491">ME_EPZS</a>,
<a class="el" href="group__lavc__encoding.html#gga09b261f1bce5161af3485cb3302edd27a97220d3da7ac127439d96e641b48ca5f">ME_X1</a>,
<a class="el" href="group__lavc__encoding.html#gga09b261f1bce5161af3485cb3302edd27a842aadc9a6d4f1c9fa20a17c77521327">ME_HEX</a>,
<a class="el" href="group__lavc__encoding.html#gga09b261f1bce5161af3485cb3302edd27a933a98fe54bd38c7ba77ca9a917e3bc8">ME_UMH</a>,
<br/>
  <a class="el" href="group__lavc__encoding.html#gga09b261f1bce5161af3485cb3302edd27ad0718ff68dd2d8f9642f5ca4aab1e181">ME_TESA</a>,
<a class="el" href="group__lavc__encoding.html#gga09b261f1bce5161af3485cb3302edd27ab2b41a1b4640728bd95c1910b111270f">ME_ITER</a> =50
<br/>
}</td></tr>
<tr class="memdesc:ga09b261f1bce5161af3485cb3302edd27"><td class="mdescLeft"> </td><td class="mdescRight">motion estimation type. <a href="group__lavc__encoding.html#ga09b261f1bce5161af3485cb3302edd27">More...</a><br/></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga9f820c481615c3a02d0407bac0bdbf25"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structAVCodec.html">AVCodec</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__encoding.html#ga9f820c481615c3a02d0407bac0bdbf25">avcodec_find_encoder</a> (enum <a class="el" href="group__lavc__core.html#gaadca229ad2c20e060a14fec08a5cc7ce">AVCodecID</a> id)</td></tr>
<tr class="memdesc:ga9f820c481615c3a02d0407bac0bdbf25"><td class="mdescLeft"> </td><td class="mdescRight">Find a registered encoder with a matching codec ID. <a href="#ga9f820c481615c3a02d0407bac0bdbf25">More...</a><br/></td></tr>
<tr class="separator:ga9f820c481615c3a02d0407bac0bdbf25"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaa614ffc38511c104bdff4a3afa086d37"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structAVCodec.html">AVCodec</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__encoding.html#gaa614ffc38511c104bdff4a3afa086d37">avcodec_find_encoder_by_name</a> (const char *name)</td></tr>
<tr class="memdesc:gaa614ffc38511c104bdff4a3afa086d37"><td class="mdescLeft"> </td><td class="mdescRight">Find a registered encoder with the specified name. <a href="#gaa614ffc38511c104bdff4a3afa086d37">More...</a><br/></td></tr>
<tr class="separator:gaa614ffc38511c104bdff4a3afa086d37"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga93a49fbd0973b216dcb8a8c5dffe1d82"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__encoding.html#ga93a49fbd0973b216dcb8a8c5dffe1d82">avcodec_encode_audio2</a> (<a class="el" href="structAVCodecContext.html">AVCodecContext</a> *avctx, <a class="el" href="structAVPacket.html">AVPacket</a> *avpkt, const <a class="el" href="structAVFrame.html">AVFrame</a> *<a class="el" href="extract__mvs_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>, int *got_packet_ptr)</td></tr>
<tr class="memdesc:ga93a49fbd0973b216dcb8a8c5dffe1d82"><td class="mdescLeft"> </td><td class="mdescRight">Encode a frame of audio. <a href="#ga93a49fbd0973b216dcb8a8c5dffe1d82">More...</a><br/></td></tr>
<tr class="separator:ga93a49fbd0973b216dcb8a8c5dffe1d82"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaa2dc9e9ea2567ebb2801a08153c7306b"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__encoding.html#gaa2dc9e9ea2567ebb2801a08153c7306b">avcodec_encode_video2</a> (<a class="el" href="structAVCodecContext.html">AVCodecContext</a> *avctx, <a class="el" href="structAVPacket.html">AVPacket</a> *avpkt, const <a class="el" href="structAVFrame.html">AVFrame</a> *<a class="el" href="extract__mvs_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>, int *got_packet_ptr)</td></tr>
<tr class="memdesc:gaa2dc9e9ea2567ebb2801a08153c7306b"><td class="mdescLeft"> </td><td class="mdescRight">Encode a frame of video. <a href="#gaa2dc9e9ea2567ebb2801a08153c7306b">More...</a><br/></td></tr>
<tr class="separator:gaa2dc9e9ea2567ebb2801a08153c7306b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga37be256d85d78f665df27ad6c8f1d65b"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__lavc__encoding.html#ga37be256d85d78f665df27ad6c8f1d65b">avcodec_encode_subtitle</a> (<a class="el" href="structAVCodecContext.html">AVCodecContext</a> *avctx, uint8_t *buf, int buf_size, const <a class="el" href="structAVSubtitle.html">AVSubtitle</a> *sub)</td></tr>
<tr class="separator:ga37be256d85d78f665df27ad6c8f1d65b"><td class="memSeparator" colspan="2"> </td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<h2 class="groupheader">Macro Definition Documentation</h2>
<a class="anchor" id="ga4fde50e2cad4cf3d66d882a7078aeab4"></a>
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<td class="memname">#define AV_INPUT_BUFFER_MIN_SIZE   16384</td>
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<p>minimum encoding buffer size Used to avoid some checks during header writing. </p>
<p>Definition at line <a class="el" href="avcodec_8h_source.html#l00642">642</a> of file <a class="el" href="avcodec_8h_source.html">avcodec.h</a>.</p>
</div>
</div>
<h2 class="groupheader">Enumeration Type Documentation</h2>
<a class="anchor" id="ga09b261f1bce5161af3485cb3302edd27"></a>
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<div class="memproto">
<table class="memname">
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<td class="memname">enum <a class="el" href="group__lavc__encoding.html#ga09b261f1bce5161af3485cb3302edd27">Motion_Est_ID</a></td>
</tr>
</table>
</div><div class="memdoc">
<p>motion estimation type. </p>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000007">Deprecated:</a></b></dt><dd>use codec private option instead </dd></dl>
<table class="fieldtable">
<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><em><a class="anchor" id="gga09b261f1bce5161af3485cb3302edd27a93dc3282c22808d298c81bfde3882c42"></a>ME_ZERO</em> </td><td class="fielddoc">
<p>no search, that is use 0,0 vector whenever one is needed </p>
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="gga09b261f1bce5161af3485cb3302edd27a84208f4e6c361aaf87ac0c0f71116431"></a>ME_FULL</em> </td><td class="fielddoc">
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="gga09b261f1bce5161af3485cb3302edd27a712da9e85272e6bc8d73d897e40e8ab8"></a>ME_LOG</em> </td><td class="fielddoc">
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="gga09b261f1bce5161af3485cb3302edd27ab9f980e93b9500d67b1308ad0e9ce72a"></a>ME_PHODS</em> </td><td class="fielddoc">
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="gga09b261f1bce5161af3485cb3302edd27a47a2cf1ba9719d733ff2c0c0fc6e3491"></a>ME_EPZS</em> </td><td class="fielddoc">
<p>enhanced predictive zonal search </p>
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="gga09b261f1bce5161af3485cb3302edd27a97220d3da7ac127439d96e641b48ca5f"></a>ME_X1</em> </td><td class="fielddoc">
<p>reserved for experiments </p>
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="gga09b261f1bce5161af3485cb3302edd27a842aadc9a6d4f1c9fa20a17c77521327"></a>ME_HEX</em> </td><td class="fielddoc">
<p>hexagon based search </p>
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="gga09b261f1bce5161af3485cb3302edd27a933a98fe54bd38c7ba77ca9a917e3bc8"></a>ME_UMH</em> </td><td class="fielddoc">
<p>uneven multi-hexagon search </p>
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="gga09b261f1bce5161af3485cb3302edd27ad0718ff68dd2d8f9642f5ca4aab1e181"></a>ME_TESA</em> </td><td class="fielddoc">
<p>transformed exhaustive search algorithm </p>
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="gga09b261f1bce5161af3485cb3302edd27ab2b41a1b4640728bd95c1910b111270f"></a>ME_ITER</em> </td><td class="fielddoc">
<p>iterative search </p>
</td></tr>
</table>
<p>Definition at line <a class="el" href="avcodec_8h_source.html#l00662">662</a> of file <a class="el" href="avcodec_8h_source.html">avcodec.h</a>.</p>
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<h2 class="groupheader">Function Documentation</h2>
<a class="anchor" id="ga9f820c481615c3a02d0407bac0bdbf25"></a>
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<td class="memname"><a class="el" href="structAVCodec.html">AVCodec</a>* avcodec_find_encoder </td>
<td>(</td>
<td class="paramtype">enum <a class="el" href="group__lavc__core.html#gaadca229ad2c20e060a14fec08a5cc7ce">AVCodecID</a> </td>
<td class="paramname"><em>id</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Find a registered encoder with a matching codec ID. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">id</td><td>AVCodecID of the requested encoder </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>An encoder if one was found, NULL otherwise. </dd></dl>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="decoding_encoding_8c-example.html#a17">decoding_encoding.c</a>, <a class="el" href="muxing_8c-example.html#a34">muxing.c</a>, <a class="el" href="transcode_aac_8c-example.html#a22">transcode_aac.c</a>, and <a class="el" href="transcoding_8c-example.html#a33">transcoding.c</a>.</dd>
</dl>
<p>Referenced by <a class="el" href="muxing_8c_source.html#l00092">add_stream()</a>, <a class="el" href="decoding__encoding_8c_source.html#l00103">audio_encode_example()</a>, <a class="el" href="transcode__aac_8c_source.html#l00120">open_output_file()</a>, and <a class="el" href="decoding__encoding_8c_source.html#l00347">video_encode_example()</a>.</p>
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<td class="memname"><a class="el" href="structAVCodec.html">AVCodec</a>* avcodec_find_encoder_by_name </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>name</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Find a registered encoder with the specified name. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">name</td><td>name of the requested encoder </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>An encoder if one was found, NULL otherwise. </dd></dl>
</div>
</div>
<a class="anchor" id="ga93a49fbd0973b216dcb8a8c5dffe1d82"></a>
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<td class="memname">int avcodec_encode_audio2 </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structAVCodecContext.html">AVCodecContext</a> * </td>
<td class="paramname"><em>avctx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structAVPacket.html">AVPacket</a> * </td>
<td class="paramname"><em>avpkt</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="structAVFrame.html">AVFrame</a> * </td>
<td class="paramname"><em>frame</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"><em>got_packet_ptr</em> </td>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p>Encode a frame of audio. </p>
<p>Takes input samples from frame and writes the next output packet, if available, to avpkt. The output packet does not necessarily contain data for the most recent frame, as encoders can delay, split, and combine input frames internally as needed.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">avctx</td><td>codec context </td></tr>
<tr><td class="paramname">avpkt</td><td>output <a class="el" href="structAVPacket.html" title="This structure stores compressed data. ">AVPacket</a>. The user can supply an output buffer by setting avpkt->data and avpkt->size prior to calling the function, but if the size of the user-provided data is not large enough, encoding will fail. If avpkt->data and avpkt->size are set, avpkt->destruct must also be set. All other <a class="el" href="structAVPacket.html" title="This structure stores compressed data. ">AVPacket</a> fields will be reset by the encoder using <a class="el" href="group__lavc__packet.html#gac9cb9756175b96e7441575803757fb73" title="Initialize optional fields of a packet with default values. ">av_init_packet()</a>. If avpkt->data is NULL, the encoder will allocate it. The encoder will set avpkt->size to the size of the output packet.</td></tr>
</table>
</dd>
</dl>
<p>If this function fails or produces no output, avpkt will be freed using <a class="el" href="group__lavc__packet.html#ga63d5a489b419bd5d45cfd09091cbcbc2" title="Wipe the packet. ">av_packet_unref()</a>. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">frame</td><td><a class="el" href="structAVFrame.html" title="This structure describes decoded (raw) audio or video data. ">AVFrame</a> containing the raw audio data to be encoded. May be NULL when flushing an encoder that has the AV_CODEC_CAP_DELAY capability set. If AV_CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame can have any number of samples. If it is not set, frame->nb_samples must be equal to avctx->frame_size for all frames except the last. The final frame may be smaller than avctx->frame_size. </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">got_packet_ptr</td><td>This field is set to 1 by libavcodec if the output packet is non-empty, and to 0 if it is empty. If the function returns an error, the packet can be assumed to be invalid, and the value of got_packet_ptr is undefined and should not be used. </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 on success, negative error code on failure </dd></dl>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="decoding_encoding_8c-example.html#a40">decoding_encoding.c</a>, <a class="el" href="muxing_8c-example.html#a104">muxing.c</a>, <a class="el" href="transcode_aac_8c-example.html#a83">transcode_aac.c</a>, and <a class="el" href="transcoding_8c-example.html#a92">transcoding.c</a>.</dd>
</dl>
<p>Referenced by <a class="el" href="decoding__encoding_8c_source.html#l00103">audio_encode_example()</a>, <a class="el" href="transcode__aac_8c_source.html#l00550">encode_audio_frame()</a>, and <a class="el" href="transcoding_8c_source.html#l00365">encode_write_frame()</a>.</p>
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<td class="memname">int avcodec_encode_video2 </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structAVCodecContext.html">AVCodecContext</a> * </td>
<td class="paramname"><em>avctx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structAVPacket.html">AVPacket</a> * </td>
<td class="paramname"><em>avpkt</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="structAVFrame.html">AVFrame</a> * </td>
<td class="paramname"><em>frame</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"><em>got_packet_ptr</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Encode a frame of video. </p>
<p>Takes input raw video data from frame and writes the next output packet, if available, to avpkt. The output packet does not necessarily contain data for the most recent frame, as encoders can delay and reorder input frames internally as needed.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">avctx</td><td>codec context </td></tr>
<tr><td class="paramname">avpkt</td><td>output <a class="el" href="structAVPacket.html" title="This structure stores compressed data. ">AVPacket</a>. The user can supply an output buffer by setting avpkt->data and avpkt->size prior to calling the function, but if the size of the user-provided data is not large enough, encoding will fail. All other <a class="el" href="structAVPacket.html" title="This structure stores compressed data. ">AVPacket</a> fields will be reset by the encoder using <a class="el" href="group__lavc__packet.html#gac9cb9756175b96e7441575803757fb73" title="Initialize optional fields of a packet with default values. ">av_init_packet()</a>. If avpkt->data is NULL, the encoder will allocate it. The encoder will set avpkt->size to the size of the output packet. The returned data (if any) belongs to the caller, he is responsible for freeing it.</td></tr>
</table>
</dd>
</dl>
<p>If this function fails or produces no output, avpkt will be freed using <a class="el" href="group__lavc__packet.html#ga63d5a489b419bd5d45cfd09091cbcbc2" title="Wipe the packet. ">av_packet_unref()</a>. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">frame</td><td><a class="el" href="structAVFrame.html" title="This structure describes decoded (raw) audio or video data. ">AVFrame</a> containing the raw video data to be encoded. May be NULL when flushing an encoder that has the AV_CODEC_CAP_DELAY capability set. </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">got_packet_ptr</td><td>This field is set to 1 by libavcodec if the output packet is non-empty, and to 0 if it is empty. If the function returns an error, the packet can be assumed to be invalid, and the value of got_packet_ptr is undefined and should not be used. </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 on success, negative error code on failure </dd></dl>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="decoding_encoding_8c-example.html#a74">decoding_encoding.c</a>, <a class="el" href="muxing_8c-example.html#a120">muxing.c</a>, and <a class="el" href="transcoding_8c-example.html#a91">transcoding.c</a>.</dd>
</dl>
<p>Referenced by <a class="el" href="transcoding_8c_source.html#l00365">encode_write_frame()</a>, <a class="el" href="decoding__encoding_8c_source.html#l00347">video_encode_example()</a>, and <a class="el" href="muxing_8c_source.html#l00490">write_video_frame()</a>.</p>
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<td class="memname">int avcodec_encode_subtitle </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structAVCodecContext.html">AVCodecContext</a> * </td>
<td class="paramname"><em>avctx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint8_t * </td>
<td class="paramname"><em>buf</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>buf_size</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="structAVSubtitle.html">AVSubtitle</a> * </td>
<td class="paramname"><em>sub</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
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