[mythtv-users] Audio Buffer Underruns with XvMC and HD in 0.20

[Ben Curtis]

> I decided to take one step farther and see if XVMC made a difference at
> all since my yum upgrade. I installed Xine since mplayer from the upgrade
> seems to be compiled with the via unichrome fork of xvmc, and it won't
> work on my system (reference:
> http://lists.mplayerhq.hu/pipermail/mplayer-users/2006-May/060346.html).
> So after installing xine, I can do:
>
> "xine -V xv FILENAME.mpg" with 35% CPU idle
> "xine -V xvmc FILENAME.mpg" with 65% CPU idle
>
> So, looks like XVMC is functioning properly on the machine as a whole,
> just not through Myth. The same files play fine, same result as everyone
> else on the list who seems to be having issues.
>

So I did a few more tests.  This time, I tried 3 different Nvidia drivers.
 Two 8x including the latest, and one 7x.  All three had the same results
with XvMC.  1080i signals had a slight audio stuttering, and showed
reduced CPU as they should.  720p stuttered constantly on both audio and
video.  Xine continues to work great, but Myth .20 doesn't.  I may bite
the bullet and do an FC5 install to see if that works as well.

Ben