AW: AW: [Live-devel] Sync problems with dvb-t streams

[Michael Golebski]

Hi Ross!

Well, we did it the following:
we took the PES-Streams (Audio and Video) from the dvb-card, passed them
through the mpeg-demuxer (MPEG1or2Demux::createNew(..)), got the pts from
there (we just saved the pts_remainingbits) and set these timestamps as
"fTimestampBase" in "RTPSink::convertToRTPTimestamp".

Also, we modified the RTCP.cpp to set the current PTS in the RTCP-Packets.

Well, source gets sync, but VLC often says "pts!=current_date or
current_pts!=last_pts" and so video freezes every time the message appears.

I think the NTP in the RTCP packets is not correct and should also be
replaced by the timebase from the transport stream.

Have you got some hints how to get it now working properly?

Kind regards,
Michael



-----Ursprüngliche Nachricht-----
Von: live-devel-bounces at ns.live.com [mailto:live-devel-bounces at ns.live.com]
Im Auftrag von Ross Finlayson
Gesendet: Mittwoch, 15. Juni 2005 01:25
An: LIVE.COM Streaming Media - development & use
Betreff: Re: AW: [Live-devel] Sync problems with dvb-t streams


>Can we simply take the timestamp from the PES (looks different from the
>PresentationTime which is only the unixtime of the system) and use it as
the
>PresentationTime or do we have to recalculate it?

No, because the PES and the presentationTime are in different formats, you 
would need to convert between them.


	Ross Finlayson
	LIVE.COM
	<http://www.live.com/>

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