[Matroska-devel] mkvmerge seek issues

Steve Lhomme steve.lhomme at free.fr
Wed Jul 26 09:24:53 CEST 2006

ObsessiveMathsFreak wrote:
> Hi,
> I posted this to the general-mailing list, but got no response. I think 
> this is more of a development issue anyway.
> I'm attempting to mux an x264 video file encoded with mplayer, using the 
> mkvtoolnix program mkvmerge v1.7.0 on linux. Everything works fine 
> throughout all the steps, up until the video is muxed into an mkv file.
> Basically, once the movie is muxed, it plays fine, everything is in 
> synch, _but_ the on screen position bar in mplayer is incorrect. No 
> matter where I seek to, fast forward or rewind, the OSD reads out that 
> the movies is at position 0%. I can fast forward, skip ahead, etc, but 
> the OSD position meter in mplayer remains unchanged.
> At first I thought this was only a problem with mplayer, but when I play 
> the file in VLC media player, a similar problem appears. Again the movie 
> played fine, but VLC displayed no seek bar, and was also unable to fast 
> forward the movie.
> I can only assume that some kind of time code stamps or the like have 
> been changed or made unreadable somehow by mkvmerge.
> I encode the video, then mux it into an mp4 file using mp4box. Up to 
> this point there are no problems. I can still seek fine(the OSD position 
> bar appears, and will fill up as I seek further.) It is only once the 
> video is muxed into an mkv file that the seek issue becomes a problem.
> I've tried multiple encoder settings for this, but nothing seems to 
> work. Does anyone know what might be going wrong?

What is the command-line option you use to create the matroska file ? Or 
do you use MMG ?

It's more than strange that the video will play with audio in sync but 
you have no time bar. I don't even know how that's possible in VLC...

Alternatively can you upload a small part of your mux (you can try to 
mux in 2 parts with a max of 5 MB for each part) somewhere so that we 
can have a look at the file ?


robUx4 on blog <http://robux4.blogspot.com/>

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