[Ffmpeg-devel] Adding a file type, and VIC codecs
Wed Oct 18 02:45:38 CEST 2006
On Wed, Oct 18, 2006 at 02:28:21AM +0200, Derk-Jan Hartman wrote:
> On 17-okt-2006, at 21:06, Michael Niedermayer wrote:
> >On Tue, Oct 17, 2006 at 02:58:22PM -0400, Derek Piper wrote:
> >>Michael Niedermayer wrote:
> >>>> Please let me know what the view is on adding VIC codecs.
> >>>>they would be differentiated from the ffmpeg versions, e.g.
> >>>what is the difference between vic-h26* and normal h26* ?
> >>I guess that's the problem. I don't KNOW what the difference is, I
> >>didn't write them. I only know they are not compatible based on
> >>to decode one with the other. I was wondering if anyone on this
> >>list had
> >>done anything with both of variants so that they might be able to
> >>more light on it. It would probably mean a lot of trawling through
> >>looking for commonalities and seeing where they differ.
> >could you provide some file / a dumped vic-h26* stream which is
> >by the VIC code but not by ffmpeg?
> >(you can upload to ftp://upload.mplayerhq.hu)
> One of the problems with H261 is that it's possible to have multiple
> video streams in one video bitstream. In teleconferencing clients
> these present itself as sections in the final video frame (a bit like
> a videowall matrix). The separate streams can come from multiple
> locations. ffmpeg currently has no support for this. I'm not sure if
> ffmpeg even COULD merge them into one frame, or alternatively split
> them into multiple tracks.
> If I watch VIC/RAT streams on the Mbone with VLC+ffmpeg, I can view
> some of these streams. It's just that all the frames of the different
> ES'es follow eachother in a rapid fashion, with different w x h
> dimensions creating a totally unviewable stream. So it can be done,
well, this sounds like that a demuxer would be needed which splits these
doesnt sound very hard if that spliting can be done easily?
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
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