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Miguel Angel Simon Sierra
9f6c20e482
Extending a clip past the video end used to force the server-fallback path that fully remounts the preview iframe (the SDK fast path can't express the root composition's data-duration, and the runtime bakes+drops data-duration at load so it can't be patched live). On a large comp that remount is a visible hitch. Add a runtime control-bridge action set-root-duration -> clock.setDuration, so the studio can grow the transport length in place. On an extend the studio now posts it (and patches the clip's own timing live) instead of reloading; it only reloads when a GSAP source rewrite actually happened (the gsap-mutation endpoints now report a mutated flag). Non-animated extends — the common case — commit as fast as a normal edit. Verified: bridge dispatch + studio no-reload/post-message paths unit- tested; core/studio/studio-server typecheck + suites green; the built runtime artifact carries the handler; E2E confirms the extend no longer remounts the preview and still persists.
@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