[mythtv-users] Audio Video sync problems

Rainer Krienke krienke at uni-koblenz.de
Fri Mar 19 02:31:58 EST 2004


On Donnerstag, 18. März 2004 03:41, Maarten van den Berg wrote:
> On Wednesday 17 March 2004 15:18, Rainer Krienke wrote:
> > Hello,
> >
> > I just installed mythtv 0.14 on a suse9.0 box (Pentium 4,  2.4 GHz).
> > and in between its running. I have sound and video, the only problem is,
> > they are out of sync. I read the howto and set the recording source to
> > "line in" (where the audio output of the tv-card is connected to) and
> > muted line in. I also tried the xawtv test with aplay /dev/dsp. It works
> > like expected, here audio and video are a little bit out of sync.
> >
> > In mythtv however this effect (I observed it in live tv mode) is
> > stronger. So I would like to know if anyone else had a similar problem on
> > a suse9 machine with mythtv 0.14 or if anyone has a idea what still might
> > be wrong. The howto contains one more hint, that alsa has not been
> > compile with realtime support. However since suse9 uses alsa 0.9.6 this
> > should probably not be true. How can I check this?
>
> It's either in the mixer settings or maybe (do you run KDE ?) you did not
> kill the arts daemon of KDE. Try and see if it gets fixed with 'killall
> artsd' ?
>

I just checked this. Yes I run KDE (3.2.1)  but I stopped arts since I read in 
the Howto that it might cause trouble. The mixer is set up with a recording 
source to line in which is muted. So running eg xawtv does not produce any 
sound. Nevertheless the sound in mythtv is earlier that the video. This is 
true for live TV as well as for a replay of recorded videos. If I unmute 
"line in"  the time difference is even bigger. 

Any other idea I might try out?

Thanks
Rainer
-- 
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Rainer Krienke, Universitaet Koblenz, Rechenzentrum, Raum A022
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Mail: krienke at uni-koblenz.de, Web: http://www.uni-koblenz.de/~krienke
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