[FFmpeg-user] play only left/right channel from an audio input

[Lou]

On Tue, 13 Mar 2012 00:56:28 +0200
jacob s <jacobhameiri at gmail.com> wrote:

> Hello,
> 
> Given a stereo audio input, is it possible to filter only left/right
> channel ?
> For example if I have a file with 2 audio channels can I create a new file
> that has the left channel audio only ?

We need more information; "a new file that has the left channel audio
only" can be interpreted as:

* A mono output.
* A stereo output with input left audio in both channels of the output.
* A stereo output with input left audio in the left channel and silence
  in the right channel of the output.