[mythtv-users] audio sync problems after upgrade from 0.18.1 to 0.19

Jason Ferrara jason at discordia.org
Sun Apr 9 19:05:56 UTC 2006


I upgraded from 0.18.1 to 0.19 (mythtv-0.19-125.rhfc3.at) and now I  
have audio sync problems when watching live TV using bttv cards. For  
the first hour or two after starting live TV it works fine, but  
eventually the audio ends up out of sync by a second or two. If I  
switch channels, the audio goes back in sync. If I then rewind back  
to where it was out of sync that part plays back out of sync, so the  
problem is in recording, not in playback. How long it takes for  
things to go out of sync seems random. Sometimes its only after a  
half hour. Other times I've been able to go for 12 hours without it  
loosing sync. I get the problem with both of my back end machines  
(when watching from any front end), one using btaudio for sound, the  
other recording audio though a patch cable from the tuner card to a  
sound card. It happens with both mpeg4 and rtjpeg encoding. I'm  
running the same kernel and tuner/audio drivers that I was with 0.18.

Any ideas? Does anyone else have this problem? Its driving me (and my  
wife) crazy.

Thanks.

- J


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