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

[Ragnar Sundblad <ragge@nada.kth.se>]

--On den 10 oktober 2004 17:08 +0100 Torgeir Veimo <torgeir@pobox.com> 
wrote:

> But surely the difference should be detectable in some way?
Sure, just compare the PTS fields? I probably don't
understand your question.

> 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.
If you are talking about a complete audio + video + other-media
decoder, I think the answer is that you will have to establish
a decoder clock, and buffer and sync the incoming streams by
looking at their PTSes so that they all get played at the
right times.

Note that the PTS of a MPEG 2 video frame can be in the
future, since some of them are sent in advande to be ably to
be used for forward referencing frames that are sent later
but presented earlier.

/ragge