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Victor KuznetsovandClaude Opus 5
8fe0b0110f
The shipped profile was certified by one oracle row, but only noise_std was pinned: long_side and fps -- two thirds of what the verifier was actually shown -- could move with a green suite. The test now derives the pin from data/evaluations/video-synthid-oracle.csv, so a default without a certifying row fails. The certified profile is a perturbation-to-signal ratio, not a bare noise_std. sd-vae-ft-mse publishes no scaling_factor key, so 0.18215 comes from the AutoencoderKL class default under an upper-unbounded diffusers pin. The loader now gates that value, carries it on VideoVaeRuntime, and passes it into encode and decode so the validated value is the applied value. video_synthid_sweep.py loads through the same function: the harness producing the certified rows was the one path exempt from the gate it exists to feed. psnr_db is measured against the already-resized frame and before the encoder, so it cannot see the downscale, the decimation, or the codec, and no in-loop metric can. scripts/video_fidelity_probe.py scores the delivered file end to end, streaming the way the engine does and sharing its frame-selection rule rather than copying it -- a frame-count check cannot catch a rule that reorders frames without changing how many. The manifest gains source geometry, vae, track, verbatim verdict and session fields. The two 2026-07-31 rows keep them empty: they were never recorded and are not recoverable. Verdicts now have four states, because the verifier's unclear reading logged as not_detected is the silent regression the manifest exists to prevent. docs/video-synthid-quality-research.md records the research behind this: the noise axis is worth about 2 dB and is nearly exhausted, resolution is the real prize but is an uncertified destruction axis rather than a free win, and every proposed autoencoder swap was refuted. First local measurements included. Verified: engine output is byte-identical before and after the refactor on a locally built clip, at noise_std 0.00 and 0.15. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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| 1 | date | source_url | source_sha256 | source_width | source_height | source_fps | duration_seconds | source_verdict | vae | noise_std | long_side | fps | seed | output_sha256 | output_verdict | output_verdict_text | output_detected_range | track | session_id | stratum | psnr_db | temporal_residual_ratio |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 2026-07-31 | https://storage.googleapis.com/gdm-deepmind-com-prod-public/media/media/veo__veo-3__off-road.mp4 | 79a552b9406a079682440c31f14d33a10ba8e1b8b2e96425f5de70f63350299d | 8 | detected_all_frames | 0.10 | 512 | 12 | 0 | 079165105d4c56e1612091987c08c2627049423025f74c0d4e245fb47c2ff0e3 | detected | 26.2932 | 1.0072 | |||||||||
| 3 | 2026-07-31 | https://storage.googleapis.com/gdm-deepmind-com-prod-public/media/media/veo__veo-3__off-road.mp4 | 79a552b9406a079682440c31f14d33a10ba8e1b8b2e96425f5de70f63350299d | 8 | detected_all_frames | 0.15 | 512 | 12 | 0 | 1c4046bcfdead138353b4e2a73339ba227bb5e544878d80c5bc6cd8427c7b00e | not_detected | 25.3911 | 1.0578 |