feat: add MOV (ProRes 4444) as transparent video output format - #224
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WebM VP9 alpha works in browsers but not in video editors (CapCut, Final Cut, Premiere, DaVinci). Add MOV with ProRes 4444 as the editor-compatible transparent video format — the industry standard used by Remotion and professional pipelines. - Add `mov` to CLI `--format` option alongside mp4/webm - Wire ProRes 4444 (yuva444p10le) in getEncoderPreset for mov format - Handle .mov in muxVideoWithAudio and applyFaststart - Add ProRes pix_fmt to streaming encoder - Treat mov like webm for alpha capture (PNG frames, screenshot mode) - Add MOV option to studio export dropdown - Add .mov mime type to file servers - Add encoder preset tests for mov format Usage: hyperframes render --format mov --output overlay.mov
jrusso1020
reviewed
Apr 8, 2026
jrusso1020
reviewed
Apr 8, 2026
jrusso1020
reviewed
Apr 8, 2026
Documents the --format mov option for ProRes 4444 transparent video, format comparison table, authoring tips for transparent compositions, and verification methods. Adds --format to the CLI options table.
Addresses review feedback — replace chained ternary format/extension logic with FORMAT_EXT lookup maps across CLI, studio API, studio UI, and render orchestrator.
jrusso1020
approved these changes
Apr 8, 2026
- Add missing -pix_fmt to chunkEncoder ProRes path (critical: alpha would silently be lost in non-streaming encode mode) - Fix chunked concat using wrong extension for MOV chunks - Add MOV to render listing filter, deletion cleanup, and ID regex - Fix Content-Type for MOV renders (video/quicktime via shared helper) - Add MOV to meta file path regex in studioServer and vite.config
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Summary
--format movto the render CLI for ProRes 4444 transparent video outputTransparency format comparison
Changes
movto--formatvalidation, examples, and output path logicgetEncoderPreset()returns ProRes 4444 (yuva444p10le) formovformat; handle.movinapplyFaststartandmuxVideoWithAudio; addpix_fmtto streaming encoder ProRes pathmovlikewebmfor alpha capture (PNG frames, screenshot mode,forceScreenshot)movto studio API types, render route, and mime helpersUsage
Test plan
pnpm buildpassespnpm --filter @hyperframes/engine test— 42 tests pass (2 new for MOV)oxlintandoxfmtclean on all 12 changed filesyuva444p12le) with working alpha--format mov— ProRes 4444 confirmed via ffprobe