How to get specific stereo audio channel from video using ffmpeg?

Question

fmpeg

How to get specific stereo audio channel from video using ffmpeg?

Answer 1

First run:
to get a list of streams, which will look something like this:

Stream #0:0(eng): Video: h264 (High), yuv420p, 1920x800, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
    Stream #0:1(ger): Audio: dts (DTS), 48000 Hz, 5.1(side), s16, 1536 kb/s (default)
    Stream #0:2(eng): Audio: dts (DTS), 48000 Hz, 5.1(side), s16, 1536 kb/s
    Stream #0:3(ger): Subtitle: text (default)

Then - actually extract:
Take the parameter value -mapfrom the list. In this option, the channel will simply be copied without changes. If you also need to recompress it, then you need to -copyset the compression parameters instead.
In order to separate the stereo channels, the command would be:
I'm not sure if the option -map_channelwill work if called directly on a video file, so you may have to first extract the audio stream and then extract the desired channel from it with a second command.