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Old 16th January 2021, 14:48   #7965  |  Link
PoeBear
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Join Date: Jan 2017
Posts: 48
What CLI option(s) should I be tweaking to help stop chroma bleed? It seems that no matter how low I go with CRF, my reds will still bleed out into neighboring areas

My options are roughly a mix of veryslow and placebo, with some other options thrown in. Here's one from a recent 1080p/HDR test:
Quote:
avs2yuv.exe "Test.avs" - | "x265.exe" -D 10 --crf 14 --profile main10 --level-idc 5.1 --high-tier --preset placebo --input-depth 16 --cu-lossless --pmode --bframes 16 --qg-size 32 --frame-threads 4 --ref 6 --limit-refs 1 --merange 57 --no-amp --tskip --tskip-fast --limit-modes --no-open-gop --hrd --cbqpoffs -0 --crqpoffs -1 --no-cutree --deblock -2:-2 --psy-rd 2.50 --psy-rdoq 1.00 --qcomp .6 --aq-mode 2 --aq-strength 1.0 --ipratio 1.3 --pbratio 1.2 --vbv-bufsize 160000 --vbv-maxrate 160000 --aud --hdr10 --hdr10-opt --range limited --colorprim bt2020 --transfer smpte2084 --colormatrix bt2020nc --master-display G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(40000000,50) --max-cll 602,187 --chromaloc 2 --repeat-headers --output "C:\Temp\Test.hevc" --frames 5000 --y4m -
I've tried a few numerous tweaks: amp, no-amp, pmode, no-pmode, pme, no-pme, hme instead of merange, dropping cbqpoffs/crqpoffs a bit further. All which really only affect very minor detail retention, likely due to such low CRF, but I still get color bleeds

I know my settings are a bit absurd, I'm getting around 1.2FPS on a 3900X with around 60% load, but my goal is transparency mostly, with a tiny hint of keeping speeds above 1FPS

Side question: Is there anyway to increase load usage with command line x265 without affecting PQ? Ie without using something like RipBot's distributed encoding
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