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Old 8th April 2019, 22:11   #16  |  Link
Asilurr
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Join Date: Jan 2019
Posts: 9
The same seems to happen with libvpx, it just got outmatched on a small "DVD rip" sample (4:3 576p50, 8-bit 4:2:0, ~700 frames):
x264 --preset veryslow --qp 0 || relative filesize 100.0%
x264 --preset fast --qp 0 || 100.6%
vpxenc --cpu-used 0 --qmin 0 --qmax 0 || 104.1%
vpxenc --cpu-used 3 --qmin 0 --qmax 0 || 116.6%

Frankly, the gaps are reminiscent of ESF's results above. Both x265 and libvpx use at least ~5% more bitrate than x264 in lossless scenarios, apparently.
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