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Re: [OpenDivX] using mpeg2 decoding hardware for divx decoding

Am Donnerstag, 22. Februar 2001 13:12 schrieb zap twentyfive:
> Hello,
> I'm a software engineer working for Philips semiconductors and currently
> I'm looking into porting parts of divx to Philips Trimedia:
> Both platforms have hardware support for MPEG2 decoding as well as video
> coprocessor units which can do things like filtering and colorspace
> conversion.

Well, the main problem that you will have is a compatibility issue.

OpenDivX in its current state is not compatible to the original DivX ;-)
codec. That is because DivX ;-) is a hacked Microsoft MPEG-4 V3 codec.
And Microsoft has decided to diverge slightly from the ISO MPEG-4 standard
in an undocumented way. That is probably why up to date the OpenDivX
codecwill not decode DivX ;-) movies, but instead uses the "official" ISO
MPEG4 format (it is based on ISO reference software, actually. Has anyone
checked whether this is legal in the first place?)


 Christian Buchner

OpenDivX mailing list
[email protected]

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