우분투 breezy 에서 5.1채널 문제

supaflow의 이미지

우분투 breezy , nforce2 칩셋에 alsa 쓰고 있습니다.

# speaker-test -c6

이렇게 하면 5.1채널 다 분리되어서 들리거든요.
alsa믹서 에서 볼륨 조절도 가능하구요.

근데 막상 동영상을 보면 front 스피커밖에 안들립니다.
mplayer에서 설정해줘두 그렇네요..
정말 난감하네요..
5.1채널 문제땜에 씨름한게 언제부턴지....;;
조언좀 부탁드립니다.

atie의 이미지

mplayer -channels 6 해도 그런가요?

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I paint objects as I think them, not as I see them.
atie's minipage

supaflow의 이미지

...............
Trying to force audio codec driver family mp3lib...
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
AUDIO: 48000 Hz, 2 ch, s16le, 128.0 kbit/8.33% (ratio: 16000->192000)
Selected audio codec: [mp3] afm:mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================
Opening video filter: [pp]
Opening video filter: [scale]
==========================================================================
Trying to force video codec driver family vfwex...
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffodivx] vfm:ffmpeg (FFmpeg MPEG-4)
==========================================================================
Building audio filter chain for 48000Hz/2ch/s16le -> 0Hz/0ch/??...
alsa-init: 1 soundcard found, using: surround51
alsa: 48000 Hz/2 channels/4 bpf/20480 bytes buffer/Signed 16 bit Little Endian
AO: [alsa] 48000Hz 2ch s16le (2 bps)
Building audio filter chain for 48000Hz/2ch/s16le -> 48000Hz/2ch/s16le...
Starting playback...
VDec: vo config request - 640 x 368 (preferred csp: Planar YV12)
[PP] Using external postprocessing filter, max q = 6.
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.74:1 - prescaling to correct movie aspect.
SwScaler: using unscaled Planar YV12 -> BGR 24-bit special converter
VO: [gl2] 640x368 => 640x368 BGR 24-bit
[gl2] You have OpenGL >= 1.2 capable drivers, GOOD (16bpp and BGR is ok!)
[gl2] antialiasing off
.........

터미널 상에서 실행시키니깐 저렇게 나오네요...
혹시 영상이 5.1ch 아니라서 그런가요..??
그렇다면 강제로 나오게 하는방법은 없을까요?