[MPlayer-dev-eng] Re: [Ffmpeg-devel] how do I enable gmc with ffmpeg?

[Michael Niedermayer]

Hi

On Sunday 12 January 2003 02:54, Arpi wrote:
> Hi,
>
> > search for A1GE-06-L2.cmp & A1GE-11-L2.cmp
> > at ftp://ftp.tnt.uni-hannover.de/pub/MPEG/video/conformance/
> >
> > these 2 use gmc accoridng to my notes
> > and u need -f m4v to read them (they are RAW MPEG4 streams (MPEG4-ES))
> > btw, sadly mplayer cant play these :((((((
>
> if you can tell me how to demux mpeg4-es i'll add.
> if it's even possible without decoding...
>
> for mpeg 1/2 es i know that a frame may begin with 0x1Bx or 0x100
> and ends with any 0x1xx (so read chunks until next 0x1Bx or 0x100)
>
> but afair mpeg4 doesn't use such picture header and slice header ids.
wrong, it does :))))

there can be different stuff at the begin 
(VOStart 0x100-0x11F, VOL 0x120-0x12F, VisObjSeqStart 0x1B0, GOP 0x1B3, 
VisObjStart 0x1B5, VOP 0x1B6)
and 0x1XX for the end

btw, -lavdopts debug=256 will print them 

Michael

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