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<aaabbb> taking a 10 second 360p y4m clip downscaled from 1080p, lzma gives a better compression ratio than ffv1. why is that?
<aaabbb> "ffmpeg -i in.y4m -c:v ffv1 -slicecrc 0 -context 1 -pass 2 -g 0 -slices 4 -coder 2 -level 3 -y out.mkv" vs "xz -9 in.y4m"
<aaabbb> y4m = 83mb, ffv1 = 42mb, lzma = 34mb
<aaabbb> all 251 frames in total (25fps). for comparision hevc (veryslow crf20 tune psnr) = 2.4mb. i'm surprised that a dedicated lossless codec performs worse than lzma
<furq> what do you get with x264 -qp 0
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<aaabbb> furq: 25mb
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<aaabbb> so why is ffv1 producing worse compression than lzma? am i using it wrong? is it not effective at compressing low resolution or short videos?
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