[mythtv-users] Trylock has spun XX times - problems with .avi playback

[Andrey Zhunev]

Hello All,

I asked this question on the forum, but got only 10 views over the
last 24 hours - so maybe the mailing list is more popular...

I'm running Myth 0.27.3 (build from a relatively fresh source) on a
CentOS 6.4. I have an issue with internal player while playing back
some .avi files. In some cases a video becomes "a slideshow" for a
couple of seconds (lots of frames get dropped while audio still sounds
smooth), then the playback continues normally. I think this happens
only in places where the video was previously cut and 'glued' back
together, so this looks to be an .avi file issue. But it only behaves
this way when played by Myth's internal player. The same video file
plays perfectly smooth in mplayer as well as several Windows-based
players that I tried.

Also, I see exactly the same behavior on my backend/frontend machine
running Intel video + VAAPI and on my dedicated frontend with an
NVIDIA + VDPAU. Both machines are powerful enough to handle the task
without being heavily loaded (the BE machine is a Core i7, SATA HDDs,
plenty of RAM, etc.). So this does not seem to be something
hardware-specific.

Whenever this happens, mythfrontend log shows 'TryLock has spun'
followed by 'Video is XX frames ahead of audio'. Full log is here:
http://pastebin.com/raw.php?i=vBRXeQ0u

The issue started long ago - I don't remember exactly when. I guess it
first appeared when I switched from 0.26 to 0.27 (or maybe when Myth
moved to using internal player by default). Now my wife complained
about this issue - so I have to find a solution!



-- 
Best regards,
 Andrey