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- unified apostrophes
- flexible line length
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Reto Kromer 2016-05-06 22:05:43 +02:00
parent 1907381b83
commit b57d892f5a
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@ -763,13 +763,7 @@
<div class="well">
<h3>Combine audio tracks into one in a video file</h3>
<p><code>ffmpeg -i <i>input_file</i> -filter_complex "[0:a:0][0:a:1]amerge[out]" -map 0:v -map "[out]" -c:v copy -shortest <i>output_file</i></code></p>
<p>This command combines two audio tracks present in a video file
into one stream. It can be useful in situations where a downstream
process, like YouTube's automatic captioning, expect one audio
track. To ensure that you’re mapping the right audio tracks run
ffprobe before writing the script to identify which tracks are
desired. More than two audio streams can be combined by extending the
pattern present in the -filter_complex option.</p>
<p>This command combines two audio tracks present in a video file into one stream. It can be useful in situations where a downstream process, like YouTube’s automatic captioning, expect one audio track. To ensure that you’re mapping the right audio tracks run ffprobe before writing the script to identify which tracks are desired. More than two audio streams can be combined by extending the pattern present in the -filter_complex option.</p>
<dl>
<dt>ffmpeg</dt>
<dd>starts the command</dd>