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Old 22nd April 2020, 19:28   #16  |  Link
benwaggoner
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Join Date: Jan 2006
Location: Portland, OR
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Quote:
Originally Posted by foxyshadis View Post
If you really do want to scrape the bottom of the bit budget, x265 will always be better than x264, and likewise AV1 will always be better than x265 -- when compute time is no obstacle.
Well, AV1 is a bitstream and x265 is an encoder; comparing x265 would be versus a specfic AV1 encoder. While various assertions have been made about AV1 being "20% more efficient" than HEVC, most of those claims fall apart when subjective comparisons are made between an optimally-tuned x265 and an optimally-tuned libaom or rav1e. The 20% number was comparing mean PSNR at a fixed QP without any rate control, dynamic frame type selection, and a bunch of other constraints typical of reference encoders but far from how anyone actually encodes video for people to watch.
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