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feat: add encoder tuning harness

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
surv
2026-09-30 07:20:33 +02:00
co-authored by Claude Opus 5.5
parent 49130f5ecf
commit ceff95ff40
14 changed files with 524 additions and 13 deletions
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tools/encode/configs/av1-axes.txt
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# SVT-AV1 4.2 per-axis sweep: each line changes one thing from av1-base.
# Base = pass-1 settings (preset 6, no film grain) plus a 10 s GOP and scene-cut detection.
av1-base | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1
# ffmpeg's libsvtav1 defaults to tune=1 (PSNR); 0 is the visual-quality tune
av1-tune0 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1:tune=0
# Alt-ref temporal filter: prime suspect for smeared filaments during zooms
av1-tf0 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1:enable-tf=0
av1-tfs1 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1:tf-strength=1
# Variance boost: more bits to flat, low-variance blocks (gradient banding)
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
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
# Quantisation matrices, deblocking sharpness, AC bias (texture), overlays
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
av1-sharp1 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1:sharpness=1
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
av1-ov1 | -pix_fmt yuv420p10le -c:v libsvtav1 -preset 6 -crf 30 -svtav1-params film-grain=0:keyint=600:scd=1:enable-overlays=1