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

[Ilariu Raducan <ilariu@gmail.com>]

On Mon, 11 Oct 2004 17:59:31 +0200, Holger Waechtler <holger@qanu.de> wrote:
> 
> 
> Torgeir Veimo wrote:
> 
> >On Sun, 2004-10-10 at 19:07 +0200, Måns Rullgård wrote:
> >
> >
> >>>But surely the difference should be detectable in some way? I think
> >>>
> >>>
> >>the
> >>
> >>
> >>>difference is less on some channels (TMF, some news channel). I
> >>>
> >>>
> >>delay
> >>
> >>
> >>>video constantly by 160ms to compensate for this, but automating it
> >>>would be preferable.
> >>>
> >>>
> >>Are the PTS values offset from the true values?  Or are you using some
> >>player that doesn't use PTS for synchronization?  Both sound pretty
> >>broken to me.
> >>
> >>
> >
> >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.
> 
> Holger
> 

Ilariu
>