[mythtv] pre-buffer pause with "usleep with busy wait" timing
Steven
mythmail at richardstraat.homedns.org
Tue Oct 26 08:38:13 UTC 2004
Steven wrote:
> Pundit-R with 512 MB, 2,4 Celeron, 2.6.8.1 kernel, fglrx ati driver for
> TVOUT.
> PVR350 card but not using its tvout. ivtv 0.2rc driver from a couple of
> days ago.
>
> - Every minute or so I see a prebuffer pause in my mythfrontend logfile
> and see a video/sound skip when it happens.
>
> from top:
>
> 2484 mythtv 15 0 111M 72M 50840 S 28.8 16.5 3:27 0
> mythfrontend
> 2386 root 15 0 93328 24M 82556 S 25.7 5.6 2:41 0 X
> 2233 root 15 0 52708 13M 22632 S 2.6 3.1 0:18 0
> mythbackend
>
> This is from my mythfrontend log :
> 2004-10-24 20:48:58 Opening OSS audio device '/dev/dsp'.
> 2004-10-24 20:48:58 Audio fragment size: 4096
> 2004-10-24 20:48:58 Using XV port 59
> 2004-10-24 20:48:59 Video timing method: USleep with busy wait
> 2004-10-24 20:48:59 Using realtime priority.
> 2004-10-24 20:48:59 Changing from None to WatchingLiveTV
> 2004-10-24 20:50:22 prebuffering pause
> 2004-10-24 20:50:47 prebuffering pause
>
> It also happens playing back pre recorded stuff.
> PLaying back the recordings with mplayer or on my EPIA-M frontend works
> just fine.
>
> I'm using myth cvs from yesterday.
>
> Any tips on what to try to fix this?
A bit more info on this :
If i disable extra audio buffering i get periods of about 10 seconds
without sound and with video skips (looks like fast forward) .
If i enable "use video as timebase" I still get skips but also an
occasional frozen picture and what looks like a hanging frontend.
I would like to know if this is a bug in myth and I should try and
provide a backtrace or if it its something specific to my system setup.
Steven
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