[MPlayer-users] about -af <something> and channel switching.

[Alexander Roalter]

After doing some reading on the dev-list and finding out that the issue 
of the inclusion of any audio filter breaks mplayer when doing channel 
switching with '#' I dug into the code a bit and read around what seems 
to be the problem.

At least to my understanding, after channel switching the correct number 
of output channels is not set anymore (it is zero, which is bad).

Now for my really special case I can live with it setting it fixed at 6 
channels, but this is really ugly and is wrong for all other cases, so 
it should be avoided setting it to 0 in the first place.

Now as I understand this, changing the audio channel does not affect the 
number of output channels, which is specified with the -channels option 
and should not change during playback (as it is my understanding).

Sure, the number of input channels may change, and even depending on 
some other audio filter settings, which may react differently on a 
differing number of input channels, but the number of output channels 
still should remain what it is. I have hardcoded it ATM at 6, since I 
was in a hurry implementing, but now I'm going on the lookout for the 
income of -channels to apply it there (until a real solution is found).

-- 
Cheers,
Alex