[mythtv-users] choppy playback on one network frontend fine of the other

[ryan patterson]

Hello all,

I have a really annoying problem.  My main frontend now has horrible choppy
pauses whenever I try to watch something (worse on HD recordings but alsso
affects non-HD).  I really don't know why this is happening.  I didn't
change any hardware.  This has been a stable system for over 12 months and
it worked fine for weeks after upgrading to mythtv 0.21.  I can use my
second frontend without any problems.  So I don't think the issue is with
the backend.

Here are some details about my setup:
all computers are running ubuntu 7.10 and mythtv 0.21 (I do not compile it
myself)
dedicated backend -> duel intel  Xeon 2GHz
dedicated frontend (has problems with playback) -> intel core 2 duo 1.8GHz,
nvidia Geforce 7600GS
desktop with frontend (no problems with playback) -> intel pentimum D 3GHz,
nvidia Geforce 7800

There does not seem to be any bottle necks that I can find.  The CPU load on
the frontend doesn't look critical during playback..  I have a gigabit
network which has been plenty fast for over a year.

Here are some of the error messages mythfrontend outputs:
2008-04-30 21:56:27.977 NVP: prebuffering pause
2008-04-30 21:56:27.983 WriteAudio: buffer underrun
2008-04-30 21:56:29.357 NVP: Prebuffer wait timed out 10 times.
2008-04-30 21:56:30.397 NVP: prebuffering pause
2008-04-30 21:56:33.781 NVP: prebuffering pause
2008-04-30 21:56:33.789 WriteAudio: buffer underrun
2008-04-30 21:56:34.575 NVP: prebuffering pause
2008-04-30 21:56:34.581 WriteAudio: buffer underrun
2008-04-30 21:56:35.126 RingBuf(myth://
192.168.0.210:6543/1051_20080430190000.mpg): Waited 1.0 seconds for data to
become available...
2008-04-30 21:56:35.941 NVP: prebuffering pause
2008-04-30 21:56:38.562 WriteAudio: buffer underrun
2008-04-30 21:56:38.969 NVP: prebuffering pause
2008-04-30 21:56:38.970 WriteAudio: buffer underrun
2008-04-30 21:56:39.775 RingBuf(myth://
192.168.0.210:6543/1051_20080430190000.mpg): Waited 1.0 seconds for data to
become available...
2008-04-30 21:56:40.367 NVP: Prebuffer wait timed out 10 times.
2008-04-30 21:56:41.519 NVP: prebuffering pause

Any ideas?

-- 
_____________
Ryan Patterson
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