[mythtv-users] Playback problem -- random short pauses

[Kevin Ross]

On 4/26/2011 2:11 PM, Kenneth Emerson wrote:
>
>
>
>     > Putting the change in tonight and will report back later this week.
>
>     > This user is not using nfs.
>
>     >  -- Ken E.
>
> Changes are in, there doesn't appear to be any improvement in the 
> stated problem.  I have the frontend running with -v playback,audio so 
> going through the log file is tedious; however, I may have found one 
> correlation with another process. Unfortunately, I cannot say with 
> certainty that at these instances, I experience the pause in playback. 
>  The next time I sit down to watch recordings, I will have paper and 
> pencil and will write down the exact time the pauses occur so that I 
> can try to match them up in the log file.
>
> The correlation I found was with the preview generation process.  I 
> had about three of these occurrences in about three and a half hours 
> of recording watching.  They were all similar starting with the 
> "Ignoring PREVIEW_SUCCESS" message.  Others might look in their log 
> files (probably need the verbosity set the same as I have) and see if 
> they have something similar.
>
> Below is a snippet from my log file:
>

I'm getting lots of dropped frames following those PREVIEW_SUCCESS 
messages.  I'm not getting pauses, but the dropped frames cause a glitch 
in the video playback, and it gets annoying.  It happens several times 
per show.

2011-05-11 18:56:02.435 Player(3): 62800 interlaced frames seen.
'video_output' mean = '33364.26', std. dev. = '356.17', fps = '29.97'
'video_output' mean = '33364.89', std. dev. = '177.01', fps = '29.97'
'video_output' mean = '33364.64', std. dev. = '288.06', fps = '29.97'
'video_output' mean = '33364.19', std. dev. = '604.45', fps = '29.97'
2011-05-11 18:56:15.783 Player(3): 63200 interlaced frames seen.
'video_output' mean = '33364.24', std. dev. = '659.40', fps = '29.97'
'video_output' mean = '33365.26', std. dev. = '670.68', fps = '29.97'
'video_output' mean = '33363.32', std. dev. = '809.87', fps = '29.97'
2011-05-11 18:56:23.349 PlaybackBox: Ignoring PREVIEW_SUCCESS, item no 
longer on screen.
2011-05-11 18:56:23.350 Player(3): Video is 3.66727 frames behind audio 
(too slow), dropping frame to catch up.
2011-05-11 18:56:23.350 Player(3): Video is 4.69853 frames behind audio 
(too slow), dropping frame to catch up.
2011-05-11 18:56:23.350 Player(3): Video is 5.23221 frames behind audio 
(too slow), dropping frame to catch up.
2011-05-11 18:56:23.351 Player(3): Video is 5.38521 frames behind audio 
(too slow), dropping frame to catch up.
2011-05-11 18:56:23.351 Player(3): Video is 5.24522 frames behind audio 
(too slow), dropping frame to catch up.
2011-05-11 18:56:23.351 Player(3): Video is 4.89297 frames behind audio 
(too slow), dropping frame to catch up.
2011-05-11 18:56:23.351 Player(3): Video is 4.37403 frames behind audio 
(too slow), dropping frame to catch up.
2011-05-11 18:56:23.351 Player(3): Video is 3.73758 frames behind audio 
(too slow), dropping frame to catch up.
2011-05-11 18:56:23.351 Player(3): Video is 3.01298 frames behind audio 
(too slow), dropping frame to catch up.
'video_output' mean = '32363.51', std. dev. = '24605.82', fps = '30.90'
2011-05-11 18:56:29.028 Player(3): 63600 interlaced frames seen.
'video_output' mean = '33366.80', std. dev. = '689.53', fps = '29.97'
2011-05-11 18:56:31.422 PlaybackBox: Ignoring PREVIEW_SUCCESS, item no 
longer on screen.
2011-05-11 18:56:31.498 Player(3): Video is 3.35242 frames behind audio 
(too slow), dropping frame to catch up.
2011-05-11 18:56:31.498 Player(3): Video is 3.57076 frames behind audio 
(too slow), dropping frame to catch up.
2011-05-11 18:56:31.498 Player(3): Video is 3.48726 frames behind audio 
(too slow), dropping frame to catch up.
2011-05-11 18:56:31.498 Player(3): Video is 3.1774 frames behind audio 
(too slow), dropping frame to catch up.
'video_output' mean = '34032.96', std. dev. = '23343.71', fps = '29.38'
'video_output' mean = '33364.68', std. dev. = '257.01', fps = '29.97'
'video_output' mean = '33364.12', std. dev. = '238.75', fps = '29.97'
2011-05-11 18:56:42.442 Player(3): 64000 interlaced frames seen.
'video_output' mean = '33366.32', std. dev. = '288.18', fps = '29.97'
'video_output' mean = '33365.64', std. dev. = '558.86', fps = '29.97'
'video_output' mean = '33360.81', std. dev. = '381.41', fps = '29.98'

Full logs are available if anyone wants them.

-- Kevin

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