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

[Jonathan Rogers]

D Richard Felker III wrote:
> Well OGM is not standard by any means, it's a hack from OggDS. And
> since WMP also fails to play the file (using OggDS), I don't think we
> can really call this a bug in mplayer -- it's mimicing what OggDS
> does. :))
> 
> My guess is that ogmmerge outputs something bogus when it gets a
> 0-length frame from the avi file. Probably a 0-length ogg packet. A
> better approach, since ogm has timestamps, would be to just omit
> output on 0-length input frames...

Yeah, in the absence of a standard it is difficult to define what is and 
isn't a bug. I guess Mosu would be the one to ask. I've also thought it 
would be nice if the framerate in a movie could vary, so there would 
never have to be the duplicated or dropped frame nonsense. I know MPEG-4 
video is supposed to be variable framerate. I think I also read that it 
should be possible with Matroska.

Jonathan Rogers