make_clips.sh renders lossless FFV1 4K60 test clips through the Makefile's
colour conversion; sweep.sh encodes them with a list of ffmpeg configs and
scores each with VMAF 4K (mean/p1/min), VMAF-NEG, CAMBI banding and PSNR-Y.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>