[mythtv-users] Audio Buffer Underruns with XvMC and HD in 0.20
christopher.rodd at gmail.com
Sat Sep 16 18:19:05 UTC 2006
I get the following output when I try to watch HD recordings or live HDTV:
>XvMC: picture structure FRAME
>2006-09-16 13:15:55.520 Connected to database 'mythconverg' at host:
>2006-09-16 13:15:55.625 Video timing method: USleep with busy wait
>2006-09-16 13:15:55.643 VideoOutputXv Error: ProcessFrameXvMC: Failed to
get OSD lock
>2006-09-16 13:15: 55.643 VideoOutputXv Error: ProcessFrameXvMC: Failed to
get OSD lock
>2006-09-16 13:16:03.954 WriteAudio: buffer underrun
>2006-09-16 13:16:03.997 WriteAudio: buffer underrun
>and a lot more buffer underrun errors.
>I tried to see if I could modify the source to increase the amount of
"extra audio buffering" but I couldn't find where to >change that.
>Thanks to anyone who can help me.
I'm getting the same thing since 0.20 as you. I was running svn from a week
or so before 0.20 came out without any real problems. Then on upgrade to
0.20 final all my NEW recordings from WB/CW/whatever it's called now produce
these WriteAudio warnings but, curiously, HD recordings from the major
broadcast networks (Fox/ABC/NBC/CBS) don't. Recordings made previous to
0.20 final play back without any real issue (any channel). My setup is a
little different than yours:
Athlon XP 3000
Nvidia 1.0.8774 drivers.
(i've compiled 0.20 release. no RPMs here)
I'm using XvMC with OpenGL Vsync and CPU usage is generally in the 60-90%
range when viewing HD material (this is normal for me). There doesn't seem
to be any CPU spike when I get the WriteAudio underruns. And I also have
the Extra Audio buffering enables. No deinterlace either.
I'd be happy to provide any debug output that is necessary to diagnose the
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