[MPlayer-users] QT Cinepak Decoding

Arpi arpi at thot.banki.hu
Tue Oct 23 19:42:11 CEST 2001


> On Tue, 23 Oct 2001, Arpi wrote:
> > my xanim codec wrapper catches YV12 pixel drawing calls from xa's cvid
> > codec, so i think it really uses YV12.
> 	I suppose the decoder can twist it around in any number of ways.
> Actually, I just remembered that the CVID data lends itself more to 
> packed YUV output, rather than planar: YYYYVU YYYYVU. Which YUV format
> does that resemble?

no such legal yuv format, convert to packed YVYU (YUY2) or YV12.

> > good idea - we have only win32 vfw dll for cram, but it's very buggy and
> > limited.
> 	I have several sample Video-1 files along with a textual decoding 
> algorithm that I gleaned from the XAnim source (can't find any other info
> anywhere). I'll try to get that up and running.
Ok, but please don't use xanim source. we contacted xanim author several
times but he doesn't allow using all his code in a GPL program. :(

> 	I noticed that ATI VCR-2 is listed as "crashing". Do you know if
> it's a proprietary compression format, or a bastardized YUV format?
I've read it few days ago that it's mpeg2. I'll check what type of mpeg2,
maybe libmpeg2 could decode it. It isn't surprise, as the card where i got
the VCR2 AVI is an mpeg2 encoder card by ATI.

A'rpi / Astral & ESP-team

mailto:arpi at thot.banki.hu

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