[MPlayer-users] AC3 - Strange error during channel conversion?

[Nelson Batalha]

Hi,

I'm having some problems with some compressed files, I know very little of 
this area but I did some research and found nothing like this:

I don't have a surround51 device made by alsa, so I'm using mplayer with 6 
channels in my default device, which works fine for uncompressed wav's with 
6 channels. However if I try to open compressed files in AC3 I get

==========================================================================
(...): [liba52] AC3 decoding with liba52
Using SSE optimized IMDCT transform
AC3: 5.0 (3f+2r)  48000 Hz  448.0 kbit/s
Unimplemented resampler for mode 0x7 -> 6 channels conversion - Contact 
MPlayer developers!
Using MMX optimized resampler
AUDIO: 48000 Hz, 5 ch, s16le, 448.0 kbit/11.67% (ratio: 56000->480000)
Selected audio codec: [a52] afm: liba52 (AC3-liba52)
==========================================================================
alsa-init: 5 channels are not supported
alsa-init: using device default
alsa: 48000 Hz/5 channels/10 bpf/40960 bytes buffer/Signed 16 bit Little 
Endian
AO: [alsa] 48000Hz 5ch s16le (2 bytes per sample)
...


I have sound in my front channels, rear right and subwoofer. My rear left 
speaker stayes muted. Anyone knows what's happening? (maybe that speaker 
sound is going to the subwoofer, but then where's the subwoofer sound?)

I know the file is 5.1 but this reports 5.0. DTS 5.1 files only play in 
stereo. Even more strangely, playing DVD's reports no error, but I get the 
same speaker muted. Any thought is apreciated.

Cheers,
Nelson




ps: Matrix DVD log:


....[liba52] AC3 decoding with liba52
Using SSE optimized IMDCT transform
AC3: 5.1 (3f+2r+lfe)  48000 Hz  384.0 kbit/s
Using MMX optimized resampler
AUDIO: 48000 Hz, 6 ch, s16le, 384.0 kbit/8.33% (ratio: 48000->576000)
Selected audio codec: [a52] afm: liba52 (AC3-liba52)
...
==========================================================================
alsa-init: using device default
alsa: 48000 Hz/6 channels/12 bpf/49152 bytes buffer/Signed 16 bit Little 
Endian
AO: [alsa] 48000Hz 6ch s16le (2 bytes per sample)
...

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