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

Kenneth Emerson kenneth.emerson at gmail.com
Tue Apr 26 21:11:57 UTC 2011 

>
>
>>
>> > 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:

2011-04-25 20:01:35.880 PlaybackBox: Ignoring PREVIEW_SUCCESS, item no
longer on screen.
2011-04-25 20:01:35.883 Player(2): Video is 4.83588 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.883 Player(2): Video is 7.80777 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.883 Player(2): Video is 9.78193 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.884 Player(2): Video is 11.0228 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.884 Player(2): Video is 11.6987 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.884 Player(2): Video is 11.9509 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.884 Player(2): Video is 11.9003 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.884 Player(2): Video is 11.6076 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.884 Player(2): Video is 11.1332 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.884 Player(2): Video is 10.5378 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.884 Player(2): Video is 9.83642 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.884 Player(2): Video is 9.05563 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.884 Player(2): Video is 8.23029 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.884 Player(2): Video is 7.35653 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.885 Player(2): Video is 6.44644 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.885 Player(2): Waiting for video buffers...
2011-04-25 20:01:35.885 AO: Pause 1
2011-04-25 20:01:35.889 AO: Pause 0
2011-04-25 20:01:35.889 Player(2): Video is 5.50914 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.889 Player(2): Waiting for video buffers...
2011-04-25 20:01:35.889 AO: Pause 1
2011-04-25 20:01:35.890 AO: OutputAudioLoop: audio paused
2011-04-25 20:01:35.898 AO: Pause 0
2011-04-25 20:01:35.898 Player(2): Video is 4.56638 frames behind audio (too
slow), dropping frame to catch up.
2011-04-25 20:01:35.898 Player(2): Waiting for video buffers...
2011-04-25 20:01:35.898 AO: Pause 1
2011-04-25 20:01:35.901 AO: Pause 0
2011-04-25 20:01:35.918 Player(2): Video is 3.0039 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:35.918 AO: OutputAudioLoop: Play Event
2011-04-25 20:01:35.951 Player(2): Video is 8.69658 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:35.984 Player(2): Video is 12.8012 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.018 Player(2): Video is 15.5501 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.051 Player(2): Video is 17.3869 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.084 Player(2): Video is 18.5398 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.118 Player(2): Video is 19.1946 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.151 Player(2): Video is 19.3561 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.184 Player(2): Video is 19.2524 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.218 Player(2): Video is 18.9649 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.251 Player(2): Video is 18.5394 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.284 Player(2): Video is 17.8606 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.318 Player(2): Video is 17.1418 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.351 Player(2): Video is 16.3929 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.385 Player(2): Video is 15.4865 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.418 Player(2): Video is 14.5819 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.451 Player(2): Video is 13.6937 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.485 Player(2): Video is 12.8178 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.518 Player(2): Video is 11.8162 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.551 Player(2): Video is 10.8401 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.585 Player(2): Video is 9.89834 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.618 Player(2): Video is 8.96721 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.652 Player(2): Video is 7.93922 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.685 Player(2): Video is 6.9584 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.718 Player(2): Video is 5.99802 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.752 Player(2): Video is 4.94803 frames ahead of audio,
                        doubling video frame interval to slow down.
2011-04-25 20:01:36.785 Player(2): Video is 3.9358 frames ahead of audio,
                        doubling video frame interval to slow down.

-- Ken E.
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