[mythtv-users] Sound Card Selection: Was "Choppy video"

[Jean-Yves Avenard]

Hi

2009/5/28 Josh White <jaw1959 at gmail.com>:
> I've been having a problem with my system where my video would 'pause' for a
> frame or two, every 50 seconds or so (I've timed it with a stop watch)
> regardless of whether it's sd or hd content.  I went through the steps
> listed, and I determined that it appears to be my sound card.  I've tried
> using the internal card on my motherboard, and no luck.  I had an old
> SoundBlaster Live! value card lying around, so I put that in, and it seemed
> to work; I never noiced audio problems that I could hear.  After running
> mythfrontend from a command line, it became apparent that I did have an
> audio issue:
>
> 2009-05-27 21:45:29.212 Video timing method: SGI OpenGL
> 2009-05-27 21:45:41.412 NVP: prebuffering pause
> 2009-05-27 21:45:41.463 WriteAudio: buffer underrun
> 2009-05-27 21:45:43.377 NVP: Prebuffer wait timed out 10 times.
> 2009-05-27 21:45:48.028 NVP: prebuffering pause
> 2009-05-27 21:49:21.859 NVP: prebuffering pause
>

Trying to get a nvidia 9800GT to work yesterday , with the exact same issues.
Turning off OpenGL v-sync fixed the problem.

No idea why