Hi, for a new filter, I want to rescale PAL8 subtitle bitmaps where the palette includes colors with alpha.
From what I’ve seen, swscale doesn’t support PAL8-to-PAL8, only PAL8-to-BGR8 which doesn’t support alpha and the palette is fixed with 256 entries defined by convention, while I would ideally like to be able to allow the following: - constrain the output to use the same palette as the input - adaptively quantize it to a palette with a configurable number of colors Thus it's about the palette quantization (with or without dithering) after scaling in RGBA. (or some cool algorithmic trick I'm not aware of) Is there any existing code that I could reuse? The closest I could find is pngenc, but I'm wondering whether there's something else/better somewhere in the ffmpeg libs that I haven't seen? Thanks, softworkz _______________________________________________ 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".
