adminandClaude Opus 5.5
31ce6480b2
The worker made the poster with a plain scale=320:-2. ffmpeg then read every picture as BT.601 in the limited range, so a red of 255 in a BT.709 video came out as 229 in the JPEG. The picker showed paler posters than the video in the editor. - VideoFormat::colour reads matrix and range of the converted MP4. When the file says nothing, it follows Chrome: BT.709 from 720 lines up, BT.601 below. That guess was measured in Chromium with a red H.264 video without colour tags. - posterArgs turns the picture from that matrix into BT.601 in the full range, the way a JPEG is read. accurate_rnd and full_chroma_int keep dark greys from landing two steps too low. - The search for the first moving video stream is now one helper, used by plan and colour. - Posters made before this change stay as they are. Tests: - videos.test.php in the worker image: ALL PASSED, 90 checks. Three red videos go through the real worker: BT.709 tagged, 720p without tags and 360p in BT.601. Red comes out as 254. - Counter-check with the old filter: 3 checks red, red is 229 again. - php -l clean on all three files. The gate was not run, the change has no TypeScript. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>