[mythtv-users] Audio / Video sync problems when watching liveTV

Francesco ml at punkrockworld.it
Tue Apr 17 14:11:46 UTC 2007


You're not alone....

I've the P7131 only analogic PAL version and there's the same problems.

...but I've not a solution right now.



Grégory Trélat ha scritto:
> Hi,
> 
> I have several problem with the audio / video sync when i watch LiveTV 
> or Recorded programs.
> The symptom are :
> 
> - deceleration on the video  near every five minutes
> - audio and video out of sync sometime
> 
> I think these symptoms are binded.
> 
> My config information :
> 
> Gentoo with 2.6.20  kernel
> 1 giga of RAM
> AMD Sempron 3000+
> TV card Asus MyCinema P7131 hybrid ( i use only the analog part with the 
> last v4l-dvb driver)
> Signal format is SECAM (i'm french)
> nvidia-drivers 1.0.9755-r1 with  dualhead
> Xorg 7.1
> mythtv-0.20_p12801
> Frontend + Backend on the same system
> 
> 
> So I start the frontend with  "-v playback > /home/debug" and i notice, 
> many time in the log :
> 
> 
> 
> TV: StartRecorder(): took 570 ms to start recorder.
> 2007-04-04 12:08:45.384 detectInterlace(Ignore Scan, Interlaced Scan, 
> 25, 576) ->Interlaced Scan
> 2007-04-04 12:08:45.388 Opening ALSA audio device 'default'.
> ----------------------------------
> Using deinterlace method kerneldeint
> 2007-04-04 12:08:46.138 Using realtime priority.
> ---------------------------------
> 
> 
> 2007-04-04 13:31:24.464 NVP: Video is 6.58475 frames ahead of audio,
>             doubling video frame interval to slow down.
> 2007-04-04 13:31:24.466 A audio timecode 4953721
> 2007-04-04 13:31:24.466 A audio timecode 4953753
> 2007-04-04 13:31:24.547 NVP: Video is 5.65105 frames ahead of audio,
>             doubling video frame interval to slow down.
> 2007-04-04 13:31:24.549 A audio timecode 4953785
> 2007-04-04 13:31:24.630 NVP: Video is 4.64453 frames ahead of audio,
>             doubling video frame interval to slow down.
> 2007-04-04 13:31:24.632 A audio timecode 4953817
> 2007-04-04 13:31:24.697 NVP: Video is 3.65838 frames ahead of audio,
>             doubling video frame interval to slow down.
> 2007-04-04 13:31:24.699 A audio timecode 4953849
> 2007-04-04 13:31:24.782 A audio timecode 4953881
> 2007-04-04 13:31:24.782 A audio timecode 4953913
> 2007-04-04 13:31:24.855 A audio timecode 4953945
> 2007-04-04 13:31:24.894 A audio timecode 4953977
> 2007-04-04 13:31:24.915 A audio timecode 4954010
> 2007-04-04 13:31:24.974 A audio timecode 4954041
> 2007-04-04 13:31:24.974 A audio timecode 4954073
> 2007-04-04 13:31:24.999 A audio timecode 4954105
> 2007-04-04 13:31:25.056 A audio timecode 4954137
> 'video_output' mean = '66960.09', std. dev. = '21013.18', fps = '14.93'
> 2007-04-04 13:31:25.094 A audio timecode 4954169
> 2007-04-04 13:31:25.115 A audio timecode 4954205
> 
> A bug in the NVplayer or NVrecorder ?
> Problem with timing method ?
> 
> Am I alone with this problem ?
> Someone can help me to find an issue ?
> 
> Thanks all
> 
> 
> 
> 
> 
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