[mythtv-users] how do I stop prebuffing problems with audio

Erik van Pienbroek erik at vanpienbroek.nl
Sun Sep 7 14:25:43 UTC 2008


Op zaterdag 06-09-2008 om 18:20 uur [tijdzone -0700], schreef
kanetse at gmail.com:
> On Sat, Sep 6, 2008 at 3:49 PM, Paul <mylists at wilsononline.id.au> wrote:
> > I'm frequency seeing the following messages and getting audio slightly
> > out of sync with Video
> >
> > 2008-08-31 11:52:36.618 NVP::AddAudioData():p1: Audio buffer overflow,
> > audio data lost!
> > 2008-08-31 13:01:11.653 NVP::AddAudioData():p1: Audio buffer overflow,
> > audio data lost!
> > 2008-08-31 13:07:36.404 NVP: prebuffering pause
> > 2008-08-31 13:15:46.553 NVP::AddAudioData():p1: Audio buffer overflow,
> > audio data lost!
> >
> > My CPU doesn't seem to to be a problem ie it sits around 30-50%
> >
> >
> 
> I have been seeing this problem as well, been struggling with it for
> past few weeks.  At first, I thought it was my motherboard chipset,
> then I thought it was the sound card.  Then I started looking at the
> MythTV source code.

Hi,

I'm also encountering these kind of problems.
OS: Gentoo, Tuner: DVB-C, Video: nVidia Gforce 5200
XvMC support has been enabled.
If I play any recording or live tv (non HD-content) the CPU usage stays
low (25/40%) but the video and sound are all stuttering (thus
unviewable). If I disable sound in the mythfrontend (NULL output
device), video playback is perfect. I've tried applying the Pulseaudio
support patch which is hanging around at
http://svn.mythtv.org/trac/ticket/5473 but this doesn't solve the
problem. Even when I'm using the pulseaudio server on an external
computer.

Regards,

Erik van Pienbroek




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