[mythtv-users] what is a : WriteAudio: buffer underrun?

[Paul]

On 25/11/2009 9:15 PM, Paul wrote:
> I'm getting alot of these during playback along with some pauses , can 
> someone explain to me what the cause of these are?
> is it a Audio problem or Video problem?
> 
> 2009-11-25 20:47:48.049 WriteAudio: buffer underrun
> 2009-11-25 20:49:24.993 WriteAudio: buffer underrun
> 2009-11-25 20:58:54.003 WriteAudio: buffer underrun
> 2009-11-25 20:58:54.984 WriteAudio: buffer underrun
> 2009-11-25 21:01:18.016 WriteAudio: buffer underrun
> 
> 
> Paul
> 

I turned on frontend playback debug
note I'm using VDPAU normal profile
I now have a 8500 GT with 1GB ram surely this is fast enough for this video
and these are the messages that seem to relate to the underrun:


'video_output' mean = '39995.59', std. dev. = '161.42', fps = '25.00'
2009-11-29 17:29:24.986 WriteAudio: buffer underrun
2009-11-29 17:29:25.034 NVP(0): Video is 3.86602 frames behind audio (too slow), dropping 
frame to catch up.
2009-11-29 17:29:25.034 NVP(0): Video is 4.6745 frames behind audio (too slow), dropping 
frame to catch up.
2009-11-29 17:29:25.034 NVP(0): Video is 5.03088 frames behind audio (too slow), dropping 
frame to catch up.
2009-11-29 17:29:25.034 NVP(0): Video is 5.04815 frames behind audio (too slow), dropping 
frame to catch up.
2009-11-29 17:29:25.034 NVP(0): Video is 4.8111 frames behind audio (too slow), dropping 
frame to catch up.
2009-11-29 17:29:25.034 NVP(0): Video is 4.38333 frames behind audio (too slow), dropping 
frame to catch up.
2009-11-29 17:29:25.034 NVP(0): Video is 3.81247 frames behind audio (too slow), dropping 
frame to catch up.
2009-11-29 17:29:25.034 NVP(0): Video is 3.1406 frames behind audio (too slow), dropping 
frame to catch up.
'video_output' mean = '52594.58', std. dev. = '162213.41', fps = '19.01'
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