[linux-dvb] Re: video pts differences on dvb-t in the uk

[Holger Waechtler <holger@qanu.de>]

Torgeir Veimo wrote:

> On Mon, 2004-10-11 at 17:17 +0100, Ilariu Raducan wrote:
>  
> > On Mon, 11 Oct 2004 17:59:31 +0200, Holger Waechtler wrote:
> >    
> > > Torgeir Veimo wrote:
> > >
> > >      
> > > > I'm not too familiar with mpeg2 and a/v pts.. I see the problems with
> > > > both xawtv and vdr's softdevice. I believe the correct term isdvb
> > > > transmission audio preload time? Is there any such thing in dvb-t
> > > > transmission headers?
> > > >        
> > > It's not a DVB-T specific problem. Both the softdevice plugin and xawtv
> > > don't implement proper PCR/STC handling. See
> > >      
> > I agree with that. softdevice plays the audio with almost 1s before
> > video on some stations.
> >    
>  
> > > http://212.227.36.83/linuxtv//index.php/The_DVB_Decoder_Challenge for a
> > > discussion of the topic.
> > >      
> I thought the PCR/STC handling is to avoid clock / pts drifts, but I am
> seeing a constant, predictable offset. Does PCR/STC bring any such thing
> into the picture?
>  
Audio and Video Streams contain Presentation Time Stamps (PTS) which 
reference to the PCR.

Holger