====== ffmpeg - Audio - Map an audio file with 2 channels to a video file ======

A video file and an audio file (that contains 2 channels) - Map the video to stream 0 of the resulting file and the audio file to the next stream/s.

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===== Map all the streams =====

<code bash>
ffmpeg -i video -i audio -map 0:v -map 1:a output
</code>

<WRAP info>
**NOTE:**  Channels are conjoint tracks within a single stream, so a stereo audio has one stream which contains two channels.
</WRAP>


----

===== For explicit specification =====

<code bash>
ffmpeg -i video -i audio -map 0:v -map 1:a:0 -map 1:a:1 output
</code>