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Merge pull request #73 from kieranjol/gh-pages

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h264 from dcp - mp4/pcm fixes
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Reto Kromer 2016-07-10 11:06:44 +02:00 committed by GitHub
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<h3>H.264 from DCP</h3> <h3>H.264 from DCP</h3>
<p><code>ffmpeg -i <i>input_video_file</i>.mxf -i <i>input_audio_file</i>.mxf -c:v <i>libx264</i> -pix_fmt <i>yuv420p</i> -c:a <i>copy output_file</i></code></p> <p><code>ffmpeg -i <i>input_video_file</i>.mxf -i <i>input_audio_file</i>.mxf -c:v <i>libx264</i> -pix_fmt <i>yuv420p</i> -c:a <i>aac output_file.mp4</i></code></p>
<p>This will transcode mxf wrapped video and audio files to an H.264 encoded .mp4 file. Please note this only works for non-encrypted DCPs.</p> <p>This will transcode mxf wrapped video and audio files to an H.264 encoded .mp4 file. Please note this only works for unencrypted, single reel DCPs.</p>
<dl> <dl>
<dt>ffmpeg</dt><dd>starts the command</dd> <dt>ffmpeg</dt><dd>starts the command</dd>
<dt>-i <i>input_video_file</i></dt><dd>path and name of the video input file. This extension must be .mxf</dd> <dt>-i <i>input_video_file</i></dt><dd>path and name of the video input file. This extension must be .mxf</dd>
<dt>-i <i>input_audio_file</i></dt><dd>path and name of the audio input file. This extension must be .mxf</dd> <dt>-i <i>input_audio_file</i></dt><dd>path and name of the audio input file. This extension must be .mxf</dd>
<dt>-c:v <i>libx264</i></dt><dd>transcodes video to H.264</dd> <dt>-c:v <i>libx264</i></dt><dd>transcodes video to H.264</dd>
<dt>-pix_fmt <i>yuv420p</i></dt><dd>sets pixel format to yuv420p</dd> <dt>-pix_fmt <i>yuv420p</i></dt><dd>sets pixel format to yuv420p for greater compatibility with media players</dd>
<dt>-c:a <i>copy</i></dt><dd>use stream copy mode to re-mux instead of re-encode</dd> <dt>-c:a aac</dt><dd>re-encodes using the AAC audio codec<br/>
<dt><i>output_file</i></dt><dd>path, name and extension of the output file</dd> Note that sadly MP4 cannot contain sound encoded by a PCM (Pulse-Code Modulation) audio codec</dd>
<dt><i>output_file.mp4</i></dt><dd>path, name and <i>.mp4</i> extension of the output file</dd>
</dl>
<p>Variation: Copy PCM audio streams by using Matroska instead of the MP4 container</p>
<p><code>ffmpeg -i <i>input_video_file</i>.mxf -i <i>input_audio_file</i>.mxf -c:v <i>libx264</i> -pix_fmt <i>yuv420p</i> -c:a <i>copy output_file.mkv</i></code></p>
<dl>
<dt>-c:a <i>copy</i></dt><dd>re-encodes using the same audio codec</dd>
<dt><i>output_file.mkv</i></dt><dd>path, name and <i>.mkv</i> extension of the output file</dd>
</dl> </dl>
<p class="link"></p> <p class="link"></p>
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