[mythtv] Pause and unpause causes 3x CPU load + video stutter

[Andrew Wilson]

I've found an odd problem in recent svn code

Normal playback of any DVB-T recording using VIA XvMC and Bob
deinterlacing works fine with mythfrontend showing ~15% load. Now, if
I pause and then unpause, the load jumps up to ~50% and there is
noticeable flickery stuttering in the video.  If I save the position
and quit playback, then start playback again normality is restored,
video is smooth and frontend load is back to ~15%. I couldn't find
anything to explain this in the logs.

Anyone else seen this?

Andrew