[FFmpeg-devel] ZMBV Improved Motion Estimation
Thu May 8 12:57:45 CEST 2008
On Wed, May 07, 2008 at 10:27:13PM -0700, Mike Melanson wrote:
> I have been studying ZMBV (DosBox Capture Codec) for improvement
> opportunities. One of the first items I noticed was the motion
> estimator's block comparison function. Presently, the function XOR's 2
> blocks together bytewise and sums all XOR'd bytes, choosing the block
> with the lowest sum. This might help minimize error if the bytes in each
> block represented intensity levels. However, in this case, the bytes are
> palette indices and are more or less random numbers.
> I propose that it would be more effective to simply sum the number of
> bytes between 2 blocks that are different. I also obtained some hard
> numbers using FLI files (the -new files use the attached patch):
> $ dir *.avi
> 17104594 2008-05-07 21:44 zmbv-capcom.avi
> 16850122 2008-05-07 21:47 zmbv-capcom-new.avi
> 796366 2008-05-07 21:55 zmbv-crusher.avi
> 794910 2008-05-07 21:59 zmbv-crusher-new.avi
> 2364794 2008-05-07 21:53 zmbv-float.avi
> 2300892 2008-05-07 21:51 zmbv-float-new.avi
And where can we find the source fli files?
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
The misfortune of the wise is better than the prosperity of the fool.
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