[MPlayer-users] Need help for proper downmixing
Nico Sabbi
nsabbi at tiscali.it
Sun Apr 17 14:12:35 CEST 2005
Hi,
usually when I listen a 6 channel ac3 track in my earset I can hear only
whispers;
-af volnorm amplifies sound quite well, but isn't perfect yet.
Using -channels 2 always plays sound too low, so I replaced it with
-channels 6.
If I use
-channels 6 -af hrtf=s -ao pcm:file=x.wav
sound is exactly how I like it, but the resulting audio stream still has
6 channels,
although I verified that if I play it with -channels 2 it still sounds
correctly.
In order to amplify and downmix the original ac3 in a single pass I tried:
-channels 6 -af hrtf=s,channels=2 - there
are still 6 channels
-channels 6 -af-adv force=3,list=hrtf=s,channels=2 - audio is
accelerated (2~3 x)
So, how should I insert filters?
Thanks,
Nico
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