[FFmpeg-user] Audio channel mapping of stereo channel without re-encode

[Carl Eugen Hoyos]

Hanno Klamke <Hanno.Klamke <at> streamlab.net> writes:

> I would like to transcode a video into several 
> outputs. From the source audio I would like to 
> take either only the left or the right channel 
> into my outputs. While only transcoding the 
> video and copy the audio.

This cannot work.
(And even if you know nothing about audio encoding, 
you should be able to imagine why it cannot work for 
codecs that actually do compress in a useful way.)

Carl Eugen