[MPlayer-users] downmixing audio to mono

[ivanova]

On Sun, 29 Aug 2004 10:33:59 +0200
Torinthiel <torinthiel at megapolis.pl> wrote:

> On Sun, Aug 29, 2004 at 06:00:27AM +0200, ivanova wrote:
> > 
> > I have a file with a stereo audio track, but the one channel is silent, so
> > it really is mono.
> > 
> > I tried 'mplayer -af channels=1' and 'mplayer -channels 1' but both
> > truncates the good channel so I am left with silence ;)
> > 
> > Any other way to get the sound in both speakers?
> 
> Try -af pan=1:100:0 (or 1:0:100, depending which channel is the good
> one).
> This will get ingle channel. If you want stereo then it will be probably
> -af pan=2:100:0:100:0 or 0's and 100's swapped.
> See manpage and DOCS/HTML/en/devices.html#audio-dev for details.

Thanks for the tip ;)

1) -af pan=1:1:1 -channels 1      does not work
2) -af pan=1:0:1 -channels 1      does not work 
3) -af pan=1:1:0 -channels 1      does not work

4) -af pan=2:1:1:1:1 -channels 1  works
5) -af pan=2:0:1:0:1 -channels 1  works
6) -af pan=2:1:0:1:0 -channels 1  does not work

That last one is expected, but shouldn't the first and second one work as well?