[mythtv-users] bttv 0.9.11 skipping frames

[Bruce Markey]

Nick Hall wrote:
> I'm using a Hauppauge WinTV BT878 card for my video input. Recently
> I switch over to bttv 0.9.11 in order to use automatic gain control
> (chroma agc) which was added to the 0.9.x series. It works great but
> often, on average maybe twice for a one hour show, MythTV starts
> skipping video frames, stuttering, and the audio looses sync from
> the video since there are missing video frames. MythTV resync's
> the two admirably, but in the meantime 30 seconds of the show is
> skipped over. The machine is plenty fast (Athlon 2200+) and the
> CPU utilization averages 50-60% while recording. By looking
> /var/log/messages I see that bttv has a problem at the moment the
> stuttering occurs in the recording. Note that bttv 0.7.x does not
> have this problem, although it doesn't have the automatic gain
> control (or other advanced features). I've pasted a portion
> of the messages log below -- the first section is a log on startup
> with information about the card, the next part is what's actually
> outputted while the video is loosing frames. Has anyone seen this
> before or know in what direction to look? Thanks,

I'm using 0.9.11 and I've noticed these skips during playback
but only once or twice per week. I had assumed that these
were caused by something else but you're right, it sure looks
like a driver problem.

Please report this to Gerd or whoever is supporting this driver
at www.bytesex.org .

--  bjm