[linux-dvb] Re: jumping PTS disturb playback

[<mocm@metzlerbros.de>]

Andreas Schultz writes:
 > On Tuesday 09 April 2002 14:19, mocm@metzlerbros.de wrote:
 > > Andreas Schultz writes:
 > >  > Hi,
 > >  >
 > >  > I just came a across a wired MPEG stream on an DVD. The pts of the video
 > >  > and audio packets is jumping backward after approx. every 25th frame (at
 > >  > a cell DVD boundary). The PTS is not reset to zero though.
 > >  > This disturbs the playback over the dvb card totaly. My guess is that
 > >  > the A/V syncing is screwing up due to the jumping pts. Is there a way
 > >  > this could be handled/fixed in the firmware???
 > >  >
 > >  > Andreas
 > >
 > > Is it a multiangle DVD? In that case this has to be handled by the
 > > player. E.g. mplayer can handle that.
 > 
 > Thats what i thought first, i just spend 2 hours disecting the dvd and trying 
 > different things. This is definetly not a multi angle dvd, the problems are 
 > only in the intro, the menue streams and the bonus material. The main feature 
 > is ok - mostly. I would think that they run those streams to some kind of 
 > broken mpeg encoder.
 > The DVD in question is the German version of "Scary Movie 2".
 > 
 > BTW: playing only the video stream is ok. only the combination of video and 
 > audio is screwing up.
 > 
 > > Otherwise I can't imagine why the PTS should jump.
 > 
 > I'll could try to fix those pts jumps before sending them to the card. What is 
 > minimum amount of pts difference for the card to detect this as a jump? Do i 
 > just reset pts to zero for that?
 > 

You could turn of synching and see if it is a problem, or you could
use mplex to remux it.

Marcus


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