[Mp4-tech] Some questions concerning the compatibility of MPEG-4 Decoder

[yipan]

Dear Experts,
I have some questions concerning the compatibility of MPEG-4 Decoder, and
anticipate someone can give me a hand on this.
I have a MPEG-4 decoder supporting video streams compatible with ISO/IEC
14496-2 MPEG-4 simple profile, and as I have noticed that there are a varity
of MPEG-4 FOURCCs, such as 'divx', 'DX50', 'XVID', 'mp4s', 'm4s2', 'DIV1',
'BLZ0', 'mp4v', 'UMP4' ect, targeting specific CODEC.
So my question is whether the MPEG-4 simple profile Decoder is compatible
enough to decode all of or part of the MPEG-4 video streams with the FOURCCs
listed above?
My second question is what is difference among these CODECs with different
FourCC? Or are there any documents I can refer to in order to find out the
differences among them?
Best Regards
Yipan
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