Hi

Having written a clean-room implementation of H.261 and comparing it to the 
output of FFMPEG, I have found that FFMPEG is not spec-compliant with regard to 
negative chroma motion vectors. The spec states that chroma motion vectors are 
the luma motion vectors divided by two, and rounded *towards zero*. FFMPEG 
currently rounds towards negative infinity.

This patch makes FFMPEG compliant, but breaks the regression tests.

Christina

Attachment: 0001-H.261-chroma-motion-vectors-round-towards-zero.patch
Description: Binary data

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