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Old 1st November 2018, 05:10   #6481  |  Link
benwaggoner
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Join Date: Jan 2006
Location: Portland, OR
Posts: 4,750
Quote:
Originally Posted by TomV View Post
When I was tuning x265's presets, I tried all of these options that go beyond placebo, to see what should be included in placebo. You and anyone else are welcome to try them again, but I found it was easy to massively increase encode times, but impossible to get any meaningful improvement in efficiency.
Indeed. “—me full —cu-lossless” will tank speed unbelievably without even trivial quality improvements for typical content and use cases.

I have seen visible and measurable value from ref 6, bframes 16, and tskip at <150 Kbps. Of course, using a lot of MIPS/pixel isn’t nearly so painful at low frame sizes and bitrates.
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Ben Waggoner
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