[mythtv-users] Playback problems after upgrading from SVN 13635 to 13769

Ben Dailey ben at inspiredtechs.com
Wed Jun 27 17:05:15 UTC 2007


Matt,

If you roll back to 13764 do you still have the issue? There are have been
two (2) recent ffmpeg sync's one at revision 13655 which introduced an audio
through a blender type sound because AC3 decoding was moved internally to
ffmpeg from liba52. Then a second ffmpeg sync was done on 13765 to resolve
the audio issues created by 13655. Since 13765 mythfrontend crashes after
playing a a fraction to a few seconds of audio. I haven't had time to build
a debug release yet and get a ticket filed because I am still trying to
convince the wife that this is worth my time and the more time it is broken
that worse my cause :). So to get my system working well again I recompile
with the following additional configure options: --enable-liba52
--enable-liba52bin --disable-decoder=ac3 --enable-decoder=liba52. These move
AC3 decoding out to the external liba52 to do audio decoding this requires
that you have a52dec installed on your system. I hope this has been helpful
and look forward to see if this helps solve your problem?

Thanks,
Ben

On 6/27/07, Matt <skd5aner at gmail.com> wrote:
>
> On 6/27/07, Matt <skd5aner at gmail.com> wrote:
> > Here is my log with -v audio,playback.  I'm only attaching the part of
> > the log where (I'm fairly sure) the issue is appearing.  Although, I'm
> > not sure if it points out useful info or not:
> >
> > 2007-06-27 11:35:16.639 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:16.639 AO: audio waiting for buffer to fill: have
> > 4160 want 6144
> > 2007-06-27 11:35:16.639 AO: Broadcasting free space avail
> > 2007-06-27 11:35:16.669 AO: audio waiting for buffer to fill: have
> > 4160 want 6144
> > 2007-06-27 11:35:16.669 AO: Broadcasting free space avail
> > 2007-06-27 11:35:16.699 AO: audio waiting for buffer to fill: have
> > 4160 want 6144
> > 2007-06-27 11:35:16.699 AO: Broadcasting free space avail
> > 2007-06-27 11:35:16.729 AO: audio waiting for buffer to fill: have
> > 4160 want 6144
> > 2007-06-27 11:35:16.729 AO: Broadcasting free space avail
> > 2007-06-27 11:35:16.729 Avg read interval was 184 msec. 64K block size
> > 2007-06-27 11:35:16.739 NVP: prebuffering pause
> > 2007-06-27 11:35:16.740 NVP: Waiting for prebuffer.. 0
> > AAAAAAAAAAAAAAAAAAAAAAAAauALAAA
> > 2007-06-27 11:35:16.759 AO: OutputAudioLoop: audio paused
> > 2007-06-27 11:35:16.759 AO: 62912 bytes free on soundcard
> > 2007-06-27 11:35:16.759 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:16.780 Avg read interval was 198 msec. 64K block size
> > 2007-06-27 11:35:16.789 AO: 62528 bytes free on soundcard
> > 2007-06-27 11:35:16.789 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:16.819 AO: 62176 bytes free on soundcard
> > 2007-06-27 11:35:16.819 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:16.849 AO: 61824 bytes free on soundcard
> > 2007-06-27 11:35:16.849 NVP: Waiting for prebuffer.. 1
> > AAAAAAAAAAAAAAAAAAAAAAAAAUUuUuL
> > 2007-06-27 11:35:16.850 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:16.880 AO: 61440 bytes free on soundcard
> > 2007-06-27 11:35:16.880 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:16.910 AO: 61088 bytes free on soundcard
> > 2007-06-27 11:35: 16.910 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:16.910 Avg read interval was 185 msec. 64K block size
> > 2007-06-27 11:35:16.940 AO: 60736 bytes free on soundcard
> > 2007-06-27 11:35: 16.940 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:16.960 NVP: Waiting for prebuffer.. 2
> > uULAAAAAAAAAAAAAAAAAAAAAAUUUUUu
> > 2007-06-27 11:35:16.970 AO: 60384 bytes free on soundcard
> > 2007-06-27 11:35:16.970 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:16.971 Avg read interval was 180 msec. 64K block size
> > 2007-06-27 11:35:16.990 AO: 58112 bytes free on soundcard
> > 2007-06-27 11:35:17.010 AO: 61952 bytes free on soundcard
> > 2007-06-27 11:35:17.010 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:17.011 Avg read interval was 198 msec. 64K block size
> > 2007-06-27 11:35:17.030 AO: 59680 bytes free on soundcard
> > 2007-06-27 11:35:17.031 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:17.051 AO: OutputAudioLoop: Play Event
> > 2007-06-27 11:35: 17.051 AO: Broadcasting free space avail
> > 2007-06-27 11:35:17.051 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:17.051 AO: Broadcasting free space avail
> > 2007-06-27 11:35:17.051 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:17.051 AO: Broadcasting free space avail
> > 2007-06-27 11:35:17.051 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:17.051 AO: Broadcasting free space avail
> > 2007-06-27 11:35: 17.051 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:17.051 AO: Broadcasting free space avail
> > 2007-06-27 11:35:17.051 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35: 17.051 AO: Broadcasting free space avail
> > 2007-06-27 11:35:17.051 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:17.051 AO: Broadcasting free space avail
> > 2007-06-27 11:35:17.051 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:17.051 AO: Broadcasting free space avail
> > 2007-06-27 11:35:17.052 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:17.052 AO: Broadcasting free space avail
> > 2007-06-27 11:35: 17.052 WriteAudio: Preparing 6144 bytes (1536 frames)
> > 2007-06-27 11:35:17.052 AO: audio waiting for buffer to fill: have
> > 4928 want 6144
> > 2007-06-27 11:35:17.052 AO: Broadcasting free space avail
> > 2007-06-27 11:35:17.071 AO: audio waiting for buffer to fill: have
> > 4928 want 6144
> > 2007-06-27 11:35:17.071 AO: Broadcasting free space avail
> > 2007-06-27 11:35:17.091 AO: audio waiting for buffer to fill: have
> > 4928 want 6144
> > 2007-06-27 11:35:17.091 AO: Broadcasting free space avail
> > 2007-06-27 11:35:17.111 AO: Broadcasting free space avail
> > 2007-06-27 11:35:17.111 WriteAudio: Preparing 6144 bytes (1536 frames)
> >
> >
> > Thanks!
> > Matt
> >
>
> Just rolled back to 13635 - and the issue disappeared.  This
> eliminates the upgraded Alsa version as the cause.  I suspect this is
> due to the recent ffmpeg sync.  Please let me know what I can do to
> help.  If I don't receive any feedback on the list, I'll submit a bug
> report.
>
> Thanks!
> Matt
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>
>
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