[XviD-devel] I have trouble with the B-frame's standard
Christoph Lampert
xvid-devel@xvid.org
Wed, 24 Jul 2002 20:16:44 +0200 (CEST)
Hi,
either I am too stupid or I simply can't read. Maybe one of you
can help me, if he has a copy of the standard of a draft.
If I encode a B-frame's macroblock and the following P-frame's macroblock
at the same position ("co-located block") is SKIPed, the B-frame MB is
automatically encoded as FORWARD with (0,0) motion vector and cbp==0,
so it's also just a copy of the very first MB. In a sequence PBBP all
macroblocks at this position would be identical. Am I right?
I don't want this! I want to code the B-frames MBs individually, in
particular they are NOT supposed to be a copy, there is an object at this
position (only in the B, not in the surroundig P-frames).
I want to code a motion vector, or at least have cbp!=0
What should I do?
gruel
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