The test matrix, in public.
What we measure, what we refuse to claim, and where the browser approach stops being the right tool.
What we test
| Check | What it covers | Result |
|---|---|---|
| Cut detection | 12.5s / 720p clip, 7 hard cuts, fast-motion test patterns | 7/7 cuts, 0 false positives (pre-build harness) |
| Sampling speed | 5 fps, 63 samples, headless Chromium | 1.65s, 26.3ms per sample |
| Frame extraction | 3 × 960×540 JPEG | 80ms |
| Audio decode | AAC track, OfflineAudioContext | Decoded in the harness |
| No upload | Playwright network assertion during analysis | 0 non-GET requests |
| ZIP contents | prompts, CSV, JSON, storyboard, frames, report | 20 files for the 6-shot demo; JPEG headers and JSON parsed |
| Accessibility | Compliance checks on 6 page states | axe WCAG 2 A/AA: 0 moderate+; Lighthouse a11y 100 |
| Responsive | 11 pages × 320 / 390 / 768 / 1280 | No horizontal overflow |
The table above is the state of the built site on 8 Nov 2026. The 3-minute stress clip (720p, 90 shots) completed in 21.6 seconds; a 190-second clip was rejected with the 3-minute message; the same 6-shot demo ran in Chromium, Firefox and WebKit. Real-device Safari and a 300 MB / 4K file are still on the list — this page will be updated when they are tested.
Known limitations
- No AI/live verdict. The workbench measures pixels and rhythm. It does not certify how a shot was made.
- No metadata, OCR, C2PA or stems. Those live in the rea-video CLI.
- Cut accuracy is about ±0.1s. It is not a frame-exact conform or an EDL.
- Motion is estimated. Projection correlation separates static, pan, tilt and handheld; it does not recover a full camera path or a zoom.
- BPM is estimated. Silence or free-tempo music yields no useful beat grid.
- Codec support varies. H.264 MP4 and WebM are the safe formats; HEVC depends on the browser and OS.
- 3 minutes / 300 MB / 120 shots. Longer or larger files belong in the CLI.
- Prompts are scaffolds. They combine measurements with your brief; they do not understand the subject.
Corrections
If a measurement is wrong, a page overstates a claim, or a fact about the open-source project is out of date, send the clip or the URL to hello@reavideo.video. Corrections that change a published claim will be noted here with the date. The demo reel is six AI-generated stills animated with ffmpeg; that disclosure will stay on the page.
Check the workbench.
The best way to judge a measurement tool is to put a clip you know on the table.