[MPlayer-dev-eng] fourcc: MP4S

[Alex Beregszaszi]

On Fri, Jan 25, 2002 at 03:11:44PM +0100, Alex Beregszaszi wrote:
> On Fri, Jan 25, 2002 at 02:59:30PM +0100, Alex Beregszaszi wrote:
> > Hi folks!
> > 
> > I (re)started to work on QT/MP4 today. The demuxer code is working fine, but
> > codecs.conf contains some wrong values I think.
> > 
> > Codecs.conf uses MP4S fourcc, also this is wrong. MP4S means mpeg4
> > multiplexed stream, MP4V means mpeg4 video (codec) and MP4A means audio
> > (codec).
> 
> Hmm, -dumpvideo'd it and it's a mpeg stream (also i don't know much about
> mpeg streams, nor these PES,PS,TS,ES types).
> Btw, it can't sync, only find 0x1b3 and 0x1b6 packets. Arpi?
> I think 0x1b3 is video packet?

Nah, it contains bad 0x1b3 packets, only with packetlen=2, so
mp_header_process_sequence_header does a bad match.

> 
> > 
> > MP4S isn't working yet, becouse 'double-demuxing' isn't supported by mplayer
> > now and i think in the (very) near future it will be not supported (Arpi? :)
> > 
> > Should i change the fourcc's or anyone knows this better than me, and
> > therefore i'm wrong..
> > 
> > Secondly I get only errors with mp4v, with mpeg4ds i can get some crap in the
> > of the file, FFmpeg's codecs return bad macroblock errors, the windows codecs
> > just gives black-screen, divx4vfw just segfaults in init and divx4 is produces
> > some scrap too. (also it's the best i think ;)
> > 
> > FFmpeg:
> > V:   1.4   21   2%  0%  0.0% 0 0 0%
> > Error at MB: 102
> > Error while decoding frame!
> > 
> > Demuxer log:
> > --------------
> > MOV: Track #2:
> > MOV:  Track header!
> > MOV:  Media stream!
> > MOV:   Media header!
> > MOV:   Media info!
> > MOV: unknown chunk: dinf 28
> > MOV:    Sample info!
> > MOV:     Sample duration table! (68 blocks)
> > MOV:     Description list! (cnt:1)
> > MOV:      desc #0: mp4v
> > MOV:     Sample size table! (entries=112 ss=0) (ver:0,flags:0)
> > MOV:     Sample->Chunk mapping table!  (3 blocks) (ver:0,flags:0)
> > MOV:     Chunk offset table! (3 chunks)
> > MOV: unknown chunk: ctts 528
> > MOV:     Syncing samples (keyframes) table! (9 entries) (ver:0,flags:0)
> > MOV:    Video header!
> > MOV: unknown chunk: hdlr 29
> > MOV:  Edit atom!
> > MOV:   Edit list table (0 entries) (ver:0,flags:0)
> > MOV track: 3 chunks, 112 samples
> > pts=7440  scale=1000  time=7.440
> > ==> Found video stream: 2
> > palette_count: 16
> > Image size: 320 x 240 (36bits)
> > Fourcc: mp4v  Codec: ''
> > 
> > --
> > alex
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