[mythtv-users] AC3 passthrough is failing in certain circumstances
Matt Redmon
mythtv-user at comcast.net
Thu Mar 31 09:02:31 UTC 2005
I have a few video files that have Dolby AC3 encoding. When I try to play
them with xine or gmplayer, they play back just fine in full 5.1 glory;
however mplayer does not do likewise. mplayer will either spit out the
following message and exit or display the message and continue playing the
clip with no sound:
ALSA lib setup.c:548:(add_elem) Cannot obtain info for CTL elem
(MIXER,'IEC958 Playback AC97-SPSA',0,0,0): No such file or directory
I've tried many different variations of -ac hwac3, and -ao alsa:default but
all seem to either cause mplayer to exit or to play w/o sound. Now, the
error message seems to indicate that there is no mixer control labeled
IEC958.... and that is true. The problem is that I cannot seem to find
out why it is looking for that specific mixer.
I have a 7NIF2 and am using the onboard soundcard. Absolutely everything
else is working fine (2 channel and 5.1 surround on xine, 2 channel on
mplayer; in recordings, videos, dvds, etc.). I'm running 0.17 from ATRPMs
on FC3.
Any ideas?
Thanks!
Matt
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