[linux-dvb] Re: Lipsync

[Tomi Ollila <tomi.ollila@iki.fi>]

Thursday Sep 25 21:24:45 +0200 2003 Marcus Metzler <mocm@metzlerbros.de> wrote:
> 
> Did anyone try ts_es_demux and the mplex from mjpegtools to see if
> that gives better results. If that were the case I could just
> incorporate that one instead of the old mplex.

I tried with one 5MB file (head -5000k orig.mpg > cut.mpg). At the
beginning it has video ~1 sec ahead of audio (VPTS-APTS 1010ms). 

dvb-mplex is no issue here, since it keeps the difference found in first
audio and video "frame" timestamps it is writing to remuxed audio and video
streams...

But both mjpegtools mplex and transcode tcmplex lost even the original
timestamp difference when used those to remultiplex the `es_demux'
separated stream -- if those cannot fix the timestamps at the beginning
(or the info was already lost), how could those fix the timestamps in the
part of recording where there is discontinuity ?

mencoder -ovc copy -oac copy -of mpeg cut.mpg greated file that 
has no audio (well, they claim that is BETA CODE).

A (long) output of the tests I did is available at:

	http://www.iki.fi/too/output.txt

I hope to get lot of hits from people interested on the issue.


> Marcus


Tomi


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