[MPlayer-users] Re: [MEncoder] Synchonization lost when using Vorbis in a OGM

[Jonathan Rogers]

Moritz Bunkus wrote:
> Hmm it may be true that the Ogm demuxer does not handle those dropped
> frames properly. Unfortunately I've lost all my video sample files along
> with one of my harddrives on tuesday so I don't have any file to test
> with... If you could provide a small sample file (like 60 seconds long
> which does show the desync properly) then I'd be very happy :) Please
> upload it via FTP to mosu.no-ip.com, username upload, password only.
> 
> To mkvmerge: at the moment it does not handle dropped frames at
> all. Another reason why I'd love to have this sample file :)

Sure I can give you a sample. I am uploading a 60s chunk of the movie in 
question called "WeStand.ogm". If I let mplayer play all the way through 
it, A-V is less than -3 at some points, but greater than 0 at others. In 
particular, notice how the sync gets worse during the old B/W film 
shots, then starts to improve when it gets back to the NTSC shots of the 
men talking.

I noticed that Matroska has "real" MPEG-4 video types, though mkvmerge 
doesn't create them yet. Will that deal with this problem?

Jonathan Rogers