[mythtv] Fwd: Playback sometimes freezes on jump or FF / stream time position problem

[mythtv at merkx.demon.nl]

Yep, my last serious hang (yesterday, needed a hard reset + fsck to
restart) shows the following in the backend log:

[mpeg2video @ 0xb79d3010]ac-tex damaged at 24 5
[mpeg2video @ 0xb79d3010]Warning MVs not available

Probably didn't really need a reboot, but display/keyboard/OSD/KVM
switch were all frozen, so had no real choice...

Stanley.


On Thu, Mar 31, 2005 at 04:35:15AM -0800, John Freer wrote:
> I too found a similar problem last night.
> 
> I was on 0.3.2i off at-bleeding, I think, and my mythbackend logs
> were full of some sort of mpeg errors (hundreds of lines) that went
> something like [MPEG2 at 0x234095] Warning Missing KeyFrame at 11 23 
> and about 10 other types of messages repeating.
> 
> I also had a compounding problem with a corrupted recordingmarkup
> table that I needed to drop and replace (thanks issac).  However,
> even after I fixed that I still had flickering and jumpyness in the
> playback.
> 
> I isolated the problem to ivtv since the errors / jumpyness didn't
> exhibit with my bttv/mpeg4 card.  The problem also went away when I
> downgraded to 0.2.0, at-stable.
> 
> So, double check your recordedmarkup table and check the backend log
> for the mpeg2@ errors.  If you find 'em, consider downgrading ivtv.
> 
> YMMV.
> JF
> 
> 
> 
> --- Louie Ilievski <loudawg at comcast.net> wrote:
> > > What version of the ivtv driver are you using?
> > 
> > I'm using 0.3.2p, as you are now.  This very well may be the
> > problem, but I 
> > didn't assume so since it never has been in the past (except when
> > it's 
> > obvious from DMA errors and such).  Since I upgraded Myth and ivtv
> > that same 
> > night, I didn't consider ivtv to be the culprit.  I'll try
> > downgrading it 
> > tomorrow (err later today...need sleep first).
> > 
> > I can confirm though that the timestamp problem still exists with
> > the 0.2 
> > series.  I've been getting occasional DMA errors with it as well,
> > and this is 
> > why I upgraded to 0.3.2p, after hearing about some serious
> > improvements to 
> > the DMA code by Chris.  And, besides this freezing, it does run
> > very very 
> > well.  Not a single error since I installed it.
> > 
> > Anyway, I'll try downgrading again and see.  I will also try a
> > 2.6.8 kernel 
> > like the first reply suggested.  I'm having a hard time seeing why
> > the kernel 
> > would affect Myth behavior this way, but hey, anything's possible. 
> > Ideally I 
> > would like to keep this ivtv driver because of how well it has been
> > running.  
> > If the older kernel works with it, then I'll keep it.
> > > _______________________________________________
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> > mythtv-dev at mythtv.org
> > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev
> > 

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