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Vance Ingalls
7a99ccec6d
* fix(core): honor root data-duration when GSAP timeline ends short The authored-duration floor only counted child composition clips, never the root element's own data-duration. A composition whose GSAP timeline ended even 0.1s short of its declared data-duration reported the shorter timeline length from player.getDuration() — and the studio's adapter selection (docDuration <= adapterDur) then silently rejected the audio-capable runtime player, downgrading preview playback to the seek-scrubbing adapter, which never starts media elements or WebAudio. Result: total audio silence with zero errors anywhere. - include the root's declared data-duration in resolveAuthoredCompositionDurationFloorSeconds, making data-duration the source of truth for playable length (per the documented contract) - console.warn in the studio when playback falls back to the seek-driven adapter, since the downgrade loses audio invisibly Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * fix(studio): release static-seek adapter on native win, warn once on downgrade Review findings on the previous commit, all in the static-seek fallback path of useTimelinePlayer.getAdapter: - A cached static-seek adapter was never paused when adapter selection later resolved a native adapter (the early returns bypass the fallback branch entirely), leaving its private rAF loop seeking the player while the native transport also drives it. The core data-duration fix makes this switch path much more common. releaseStaticSeekCache() now runs at every native-adapter return and at unmount. - The downgrade warning fired on every cache miss — and the cache key can never hold for __timelines compositions because wrapTimeline() returns a fresh object per call, so it fired every rAF tick. It now warns once per downgrade streak (re-armed when a native adapter takes over). - The warning interpolated adapterDur (the native __player duration, 0 when absent) instead of the selected adapter's duration, and used a one-off "[hyperframes-studio]" prefix instead of the file's "[useTimelinePlayer]" convention. The fallback cache logic moved to playbackAdapter.ts (with unit tests for warn-once, cache identity, and pause-on-replace/release), which also keeps useTimelinePlayer.ts inside the studio 600-line limit. Also corrected a stale "no DOM reads" comment on the runtime transport tick — the duration floor has always queried the DOM per call, and now also reads the root's declared data-duration. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> --------- Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
@hyperframes/studio
Browser-based composition editor UI for Hyperframes. Provides a visual timeline, code editor, and live preview for building video compositions.
Install
npm install @hyperframes/studio
What it does
The studio is a React application with:
- Visual timeline — drag, resize, and arrange elements on tracks
- Code editor — edit HTML and GSAP scripts with CodeMirror (syntax highlighting, autocomplete)
- Live preview — see changes in real time as you edit
- Composition inspector — view and modify element properties
Development
The studio is embedded in the hyperframes preview command. To develop the studio UI itself:
cd packages/studio
bun run dev # Start Vite dev server
bun run build # Build for production
bun run typecheck # Type-check
Tech stack
- React 18/19, Zustand (state management)
- CodeMirror 6 (editor)
- Tailwind CSS (styling)
- Vite (bundler)
- Phosphor Icons
Documentation
Full documentation: hyperframes.heygen.com/packages/studio
Related packages
@hyperframes/core— types and parsers used by the editorhyperframes— CLI that serves the studio viahyperframes preview