Comment by dekhn

4 days ago

I spent some time with this on my data set, and in my hands I wasn't able to produce results that were convincingly better than libx264, but with slower encodes and larger output files. It's really hard to beat libx264.

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dekhn

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jcalvinowens  3 days ago

>> I'm still looking for better/faster lossless YUV encoding.

> I wasn't able to produce results that were convincingly better than libx264

With "-qp 0"? Otherwise, it's not a valid comparison... "-crf 13" is nowhere near lossless (though it might appear so visually).

FFV1 is much better than H264 at lossless compression in my experience. Here's a random sample of a ten second 4K input I had handy (5.5G uncompressed):

    h264-ultrafast    1.951s   850M
    h264-veryslow    46.528s   715M
    ffv1              8.883s   637M

But yeah, if you don't actually require truly lossless data, it's a huge waste.