feat: add encoder tuning harness
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Claude Opus 5.5
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# SVT-AV1 4.2 per-axis sweep: each line changes one thing from av1-base.
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# Base = pass-1 settings (preset 6, no film grain) plus a 10 s GOP and scene-cut detection.
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av1-base | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1
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# ffmpeg's libsvtav1 defaults to tune=1 (PSNR); 0 is the visual-quality tune
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av1-tune0 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0
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# Alt-ref temporal filter: prime suspect for smeared filaments during zooms
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av1-tf0 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1:enable-tf=0
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av1-tfs1 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1:tf-strength=1
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# Variance boost: more bits to flat, low-variance blocks (gradient banding)
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av1-vb | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1:enable-variance-boost=1
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av1-vb3 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1:enable-variance-boost=1:variance-boost-strength=3
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# Quantisation matrices, deblocking sharpness, AC bias (texture), overlays
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av1-qm | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1:enable-qm=1:qm-min=0
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av1-sharp1 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1:sharpness=1
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av1-acb1 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1:ac-bias=1.0
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av1-ov1 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1:enable-overlays=1
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# SVT-AV1 candidate ladders: compare combinations at matched bitrate (results/av1-ladder.tsv)
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av1-c0-14 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 14 -svtav1-params film-grain=0:keyint=600:scd=1
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av1-c0-20 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 20 -svtav1-params film-grain=0:keyint=600:scd=1
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av1-c0-26 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 26 -svtav1-params film-grain=0:keyint=600:scd=1
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av1-qm-14 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 14 -svtav1-params film-grain=0:keyint=600:scd=1:enable-qm=1:qm-min=0
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av1-qm-20 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 20 -svtav1-params film-grain=0:keyint=600:scd=1:enable-qm=1:qm-min=0
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av1-qm-26 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 26 -svtav1-params film-grain=0:keyint=600:scd=1:enable-qm=1:qm-min=0
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av1-tune0-14 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 14 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0
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av1-tune0-20 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 20 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0
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av1-tune0-26 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 26 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0
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av1-vb-14 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 14 -svtav1-params film-grain=0:keyint=600:scd=1:enable-variance-boost=1
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av1-vb-20 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 20 -svtav1-params film-grain=0:keyint=600:scd=1:enable-variance-boost=1
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av1-vb-26 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 26 -svtav1-params film-grain=0:keyint=600:scd=1:enable-variance-boost=1
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av1-qm-vb-14 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 14 -svtav1-params film-grain=0:keyint=600:scd=1:enable-qm=1:qm-min=0:enable-variance-boost=1
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av1-qm-vb-20 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 20 -svtav1-params film-grain=0:keyint=600:scd=1:enable-qm=1:qm-min=0:enable-variance-boost=1
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av1-qm-vb-26 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 26 -svtav1-params film-grain=0:keyint=600:scd=1:enable-qm=1:qm-min=0:enable-variance-boost=1
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av1-qm-vb-tune0-14 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 14 -svtav1-params film-grain=0:keyint=600:scd=1:enable-qm=1:qm-min=0:enable-variance-boost=1:tune=0
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av1-qm-vb-tune0-20 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 20 -svtav1-params film-grain=0:keyint=600:scd=1:enable-qm=1:qm-min=0:enable-variance-boost=1:tune=0
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av1-qm-vb-tune0-26 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 26 -svtav1-params film-grain=0:keyint=600:scd=1:enable-qm=1:qm-min=0:enable-variance-boost=1:tune=0
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# SVT-AV1 round 2: tune0+VB without QM, default qm-min, delivery-range CRFs (results/av1-ladder2.tsv)
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av1-vb-tune0-14 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 14 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0:enable-variance-boost=1
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av1-vb-tune0-20 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 20 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0:enable-variance-boost=1
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av1-vb-tune0-26 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 26 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0:enable-variance-boost=1
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av1-vb-tune0-32 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 32 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0:enable-variance-boost=1
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av1-qm8-vb-tune0-14 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 14 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0:enable-qm=1:enable-variance-boost=1
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av1-qm8-vb-tune0-20 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 20 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0:enable-qm=1:enable-variance-boost=1
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av1-qm8-vb-tune0-26 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 26 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0:enable-qm=1:enable-variance-boost=1
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av1-qm8-vb-tune0-32 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 32 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0:enable-qm=1:enable-variance-boost=1
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av1-qm-vb-tune0-32 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 32 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0:enable-qm=1:qm-min=0:enable-variance-boost=1
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av1-qm-vb-tune0-38 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 38 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0:enable-qm=1:qm-min=0:enable-variance-boost=1
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av1-tune0-10 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 10 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0
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# Coarse CRF probe: where do VMAF 95-97 land on each clip? (pass-1 baselines)
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x265-crf22 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 22 -x265-params log-level=error:aq-mode=3:no-sao=1
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x265-crf26 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 26 -x265-params log-level=error:aq-mode=3:no-sao=1
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x265-crf30 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 30 -x265-params log-level=error:aq-mode=3:no-sao=1
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x265-crf34 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 34 -x265-params log-level=error:aq-mode=3:no-sao=1
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av1-crf32 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 32 -svtav1-params film-grain=0
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av1-crf38 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 38 -svtav1-params film-grain=0
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av1-crf44 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 44 -svtav1-params film-grain=0
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av1-crf50 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 50 -svtav1-params film-grain=0
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# Pass 1: which presets fit the 3-5 fps budget at 4K on this machine.
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x265-fast | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset fast -crf 18 -x265-params log-level=error:aq-mode=3:no-sao=1
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x265-medium | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 18 -x265-params log-level=error:aq-mode=3:no-sao=1
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x265-slow | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset slow -crf 18 -x265-params log-level=error:aq-mode=3:no-sao=1
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av1-p5 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 5 -crf 26 -svtav1-params film-grain=0
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av1-p6 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 26 -svtav1-params film-grain=0
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av1-p7 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 7 -crf 26 -svtav1-params film-grain=0
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av1-p8 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 8 -crf 26 -svtav1-params film-grain=0
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# x265 per-axis sweep: each line changes one thing from x265-base.
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# Base = pass-1 settings (preset medium, aq-mode 3, no SAO) plus a 10 s GOP.
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x265-base | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1
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# Adaptive quantisation
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x265-aq4 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=4:no-sao=1
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x265-aqs08 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:aq-strength=0.8:no-sao=1
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x265-aqs12 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:aq-strength=1.2:no-sao=1
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# In-loop filters
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x265-sao | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3
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x265-selsao2 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:selective-sao=2
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x265-deblk-1 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:deblock=-1,-1
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# Psychovisual: medium has rdoq-level 0, so psy-rdoq needs rdoq-level 2 to do anything
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x265-psyrdoq | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:rdoq-level=2:psy-rdoq=1.0
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x265-psyrd1 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:psy-rd=1.0
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# Motion: zooms are scaling, not translation
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x265-star | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:me=star
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x265-mer92 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92
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x265-bf8 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:bframes=8
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x265-la60 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:rc-lookahead=60
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x265-rect | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:rect=1
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# x265 candidate ladders: compare combinations at matched bitrate (results/x265-ladder.tsv)
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x265-c0-12 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 12 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92
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x265-c0-16 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 16 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92
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x265-c0-20 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92
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x265-rect-12 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 12 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92:rect=1
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x265-rect-16 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 16 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92:rect=1
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x265-rect-20 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92:rect=1
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x265-rect-psyrdoq-12 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 12 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92:rect=1:rdoq-level=2:psy-rdoq=1.0
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x265-rect-psyrdoq-16 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 16 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92:rect=1:rdoq-level=2:psy-rdoq=1.0
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x265-rect-psyrdoq-20 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92:rect=1:rdoq-level=2:psy-rdoq=1.0
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x265-rect-aq4-12 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 12 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=4:no-sao=1:merange=92:rect=1
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x265-rect-aq4-16 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 16 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=4:no-sao=1:merange=92:rect=1
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x265-rect-aq4-20 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=4:no-sao=1:merange=92:rect=1
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# x265 round 2: preset fast for speed, aq-strength 1.2 for julia (results/x265-ladder2.tsv)
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x265-fast-rp-12 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset fast -crf 12 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92:rect=1:rdoq-level=2:psy-rdoq=1.0
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x265-fast-rp-16 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset fast -crf 16 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92:rect=1:rdoq-level=2:psy-rdoq=1.0
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x265-fast-rp-20 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset fast -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92:rect=1:rdoq-level=2:psy-rdoq=1.0
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x265-rp-aqs12-12 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 12 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92:rect=1:rdoq-level=2:psy-rdoq=1.0:aq-strength=1.2
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x265-rp-aqs12-16 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 16 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92:rect=1:rdoq-level=2:psy-rdoq=1.0:aq-strength=1.2
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x265-rp-aqs12-20 | -pix_fmt yuv420p10le -c:v libx265 -profile:v main10 -preset medium -crf 20 -x265-params log-level=error:keyint=600:min-keyint=60:aq-mode=3:no-sao=1:merange=92:rect=1:rdoq-level=2:psy-rdoq=1.0:aq-strength=1.2
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