diff --git a/packages/producer/tests/hdr-hlg-regression/README.md b/packages/producer/tests/hdr-hlg-regression/README.md index a1c08a120..1c4334062 100644 --- a/packages/producer/tests/hdr-hlg-regression/README.md +++ b/packages/producer/tests/hdr-hlg-regression/README.md @@ -27,13 +27,6 @@ The suite is intentionally short (5 s, two windows) — it exists to detect regressions in the HLG-specific code path, not to enumerate every composition shape (those live in `hdr-regression`). -## Tolerance - -`maxFrameFailures` is **0** here. HLG is a pure pass-through path — no known -failures, no transcoder workarounds — and HEVC encoding against the rendered -`rgb48le` buffer is byte-deterministic on the same fixture. Any drift is a -real regression, not codec noise, so the budget is the strictest possible. - ## Fixture `src/hdr-hlg-clip.mp4` — last 5 seconds of a user-recorded HEVC HLG clip, diff --git a/packages/producer/tests/hdr-regression/README.md b/packages/producer/tests/hdr-regression/README.md index b9efb3a70..0ca073903 100644 --- a/packages/producer/tests/hdr-regression/README.md +++ b/packages/producer/tests/hdr-regression/README.md @@ -15,11 +15,17 @@ covering the highest-value HDR compositing shapes. 10s / 300 frames at 30fps. ## Fixtures - `src/hdr-clip.mp4` — short HEVC Main10 / BT.2020 PQ clip with a moving - bright gradient (see `NOTICE.md` for attribution). -- `src/hdr-photo-pq.png` — 256x144 16-bit RGB PNG with a hand-injected `cICP` + bright gradient (see `NOTICE.md` for attribution). Reused across windows + A–G and as scene A of the window-H shader transition. +- `src/hdr-photo-pq.png` — 256×144 16-bit RGB PNG with a hand-injected `cICP` chunk (primaries=BT.2020, transfer=SMPTE ST 2084, matrix=GBR, range=full). + Used as scene B of the window-H shader transition. -To regenerate the PNG fixture: +ffmpeg is **not** used to generate the PNG because it does not embed `cICP` +in PNGs — without that chunk Chromium would not treat the file as HDR and the +test would silently fall back to SDR. + +To regenerate the PNG fixture (deterministic, byte-for-byte stable): ```bash python3 packages/producer/tests/hdr-regression/scripts/generate-hdr-photo-pq.py diff --git a/packages/producer/tests/hdr-regression/meta.json b/packages/producer/tests/hdr-regression/meta.json index 25f6ea5b8..7c6f42142 100644 --- a/packages/producer/tests/hdr-regression/meta.json +++ b/packages/producer/tests/hdr-regression/meta.json @@ -1,9 +1,9 @@ { "name": "hdr-regression", - "description": "HDR10 (BT.2020 PQ) regression suite. Four windows (A–D) cover the highest-value HDR compositing shapes: direct