Here is a new version of the palette filters patchset. A lot changed since last iteration. Here are a few highlights:
- The previous version had a terrible typo in the transfer function, this is now fixed - There is now a warning when the frames are not using sRGB transfer function (I'm assuming there is no way to automatically insert a convert during filter negotiation yet?) - All the code is now using integer arithmetic so it should be fully deterministic WRT tests. For more info, see http://blog.pkh.me/p/38-porting-oklab-colorspace-to-integer-arithmetic.html - The license of the palette utils is now LGPL to align with FFmpeg; the OkLab code from Björn Ottosson as well as mine in integers are distributed under public domain and MIT so this should be compatible - The scoring algorithms in the palette generation (heuristics for selecting the box and axis) changed after doing an extensive study for which you can find the results here: https://github.com/ubitux/research/tree/main/color-quantization#results - Output is more deterministic/stable due to a change in the color sorting - Overall performance is improved quite significantly from previous patchset but overall it's still slower than master (with a rough test 1.06x slower for palettegen and 1.11x slower for paletteuse, your mileage may vary), which is expected given the new model. I think that's an acceptable trade-off. - The patchset includes a lot of cleanups and drop of code, leading to an overall net negative: 12 files changed, 856 insertions(+), 878 deletions(-) Like before, I generated a bunch of outputs at key points in the history which you can consult here: http://big.pkh.me/pal/ (will be removed after patchset is merged) Also, the branch is accessible on github/ubitux/FFmpeg branch lavfi-palette for convenience. And happy xmas (a bit late) for those who celebrate it _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".