[mythtv-users] Stange stuttering video/audio occurs part way through recording

[Matt Doran]

Hi all,

I'm using 0.21-fixes, and was watching a 3 hours recording and about 2 
hours into the recording it started serious video/audio stuttering.   
With verbose "playback" logging I got the output below when the 
stuttering occurs .... before that it was working perfectly with no 
output like that.  

If I stop the playback and restart the problem continues, and the 
problem always appears at the same point in the recording.  If I rewind 
before that point it works fine, if a fast forward after the stuttering 
happens again.  That happens even after I completely restart the front-end.

The machine is has plenty of grunt, and is only consuming 20% CPU, so it 
doesn't appear to be resource related.

Over the past month or so I've seen this happen 2-3 times.   Anyone else 
seen this?

Any ideas of the cause?   Or how to diagnose it further?

Thanks,
Matt



2008-03-28 22:21:22.627 NVP: Video is 30 frames behind audio (too slow), 
dropping frame to catch up.
2008-03-28 22:21:22.629 NVP: Video is 30 frames behind audio (too slow), 
dropping frame to catch up.
2008-03-28 22:21:22.705 NVP: Video is 30 frames ahead of audio,
                        doubling video frame interval to slow down.
2008-03-28 22:21:22.785 NVP: Video is 30 frames ahead of audio,
                        doubling video frame interval to slow down.
2008-03-28 22:21:22.865 NVP: Video is 30 frames ahead of audio,
                        doubling video frame interval to slow down.
2008-03-28 22:21:22.867 NVP: Video is 30 frames behind audio (too slow), 
dropping frame to catch up.
2008-03-28 22:21:22.869 NVP: Video is 30 frames behind audio (too slow), 
dropping frame to catch up.
2008-03-28 22:21:22.945 NVP: Video is 30 frames ahead of audio,
                        doubling video frame interval to slow down.
2008-03-28 22:21:23.025 NVP: Video is 30 frames ahead of audio,
                        doubling video frame interval to slow down.
2008-03-28 22:21:23.106 NVP: Video is 30 frames ahead of audio,
                        doubling video frame interval to slow down.
2008-03-28 22:21:23.107 NVP: Video is 30 frames behind audio (too slow), 
dropping frame to catch up.
2008-03-28 22:21:23.110 NVP: Video is 30 frames behind audio (too slow), 
dropping frame to catch up.