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The thumbnail route bounds every preview capture to 240x135. That bound came from the timeline, where thumbnails are small and numerous and their decoded bytes are budgeted. The storyboard reuses the same route for its frame detail hero, which is up to 900px wide, so the poster arrived at 240x135 and upscaled past 7x on a retina display. Headlines survived it; body copy, table labels and captions did not. That is the surface where it costs the most. references/review-loop.md sends the user here to confirm layout and real copy, and tells them to run no CLI in that pass: "the poster is the only picture this pass needs". Give the caller a way to ask for the composition's own dimensions, which the route already supports as `output=source`, and fold the choice into a single `surface` prop. Whether a poster is a tile or the hero decides both the crop and the capture density, so one prop owns both rather than two that can disagree. The contact sheet keeps the bounded capture: many tiles, and it is a contact sheet. The timeline is untouched. Reported with a reproduction and a correct read of the consequences in #3271. Co-authored-by: anikam13 <22992075+anikam13@users.noreply.github.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