[MPlayer-users] Software AC3 Decoding with CM8738
Stefan Lange
hoirkman at gmx.de
Sun May 5 23:22:02 CEST 2002
Hi!
I'm experiencing a weird situation when I'm playing files with
AC3-audio with mplayer. I'm using the analog outputs of my soundcard
(CMedia CM 8783) with mplayer's software AC3 decoder. Playing back
5.1-sound with "-channels=6" works fine, but if I pause and unpause
during playback, channels are switched. For example:
Start playing (center output comes from center) --> pause --> unpause
--> center comes from front left or rear left
If I continue pausing/unpausing center-content will be swapped again,
and be back at center. I have not been able to reproduce any specific
pattern in which way the channels are exchanged during the
pause/unpause process. This isn't a big problem, just a bit weird. I'm
just wondering if anybody else can reproduce that behaviour.
I have experienced this with ANY file containing AC3 audio so far, no
matter if avi or DVD
Some details of my configuration:
Software:
-Mplayer CVS from 05.05.2002, compiled with
--disable-runtime-cpudetection and --disable-gl
-Debian Unstable, updated on 05.05.2002
-2.4.18 without any patches
-libc-2.2.5
-XFree86 4.2.0 with ati.2-drivers from gatos.sf.net
-gcc version 2.95.4 20011002 (Debian prerelease)
-GNU ld version 2.12.90.0.1 20020307 Debian/GNU Linux
-GNU assembler 2.12.90.0.1 20020307 Debian/GNU Linux
Hardware:
CPU: AMD AthlonXP 1800+
Video Card: FIC Radeon 8500LE (XF86 4.2.0 with Gatos Drivers)
Sound Card: Trust Soundexpert Digital Surround, Chipset: CMI8738-6MX
(Kernel driver from 2.4.18, compiled as module, loaded with insmod
option speakers=6)
Sample mplayer-output is attached.
~/.mplayer/config is:
# Write your default config options here!
# Video Out: SDL
vo=sdl
# Vollbild
fs=yes
# Kein Timer im OSD
osdlevel=1
vfm=5
# Frames droppen, falls CPU zu lahm
framedrop=yes
# korrektes Vollbild in icewm
fsmode=1
# post-processing
autoq=100
# audio:
#aop=list=volume,surround,volnorm
aop=list=volume,volnorm
channels=6
npp=de
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