[MPlayer-users] mplayer sets number of channels incorrectly

[Alexander Macdonald]

Hi,

I have a surround sound setup so when I play a 2-channel sound I'd like it to be 
upmixed(just copy the channels, nothing fancy) alsa does this nicely for me. 
However when I play a dvd or something with 5.1 sound mplayer downmixes it to 2 
channels :(, I can get around this by passing mplayer "-channels 6" and it 
correctly plays the file :). the problem is that when I play a 2 channel file 
with "-channels 6" mplayer sticks in blank channels which stops the upmixing 
from happening..... Is there any way I can tell mplayer to just use the number 
of channels from the file?