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James
f3964f3e45
The embedded dev server (hyperframes dev) silently reported success even when the requested port was already in use (e.g., by Cursor IDE on 3002). This happened because the old isPortAvailable() probe had a TOCTOU race and findAvailablePort() silently fell back to the original port on exhaustion. Replace with serveWithPortFallback() that binds the real Hono server directly via createAdaptorServer + manual listen(), retrying on EADDRINUSE. Shows a yellow warning when auto-incrementing and a clear error when all ports are exhausted. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Hyperframes
Write HTML. Render video. Built for agents.
Hyperframes is an open-source video rendering framework that lets you create, preview, and render HTML-based video compositions — with first-class support for AI agents via MCP.
Why Hyperframes?
- HTML-native — AI agents already speak HTML. No React required.
- Frame Adapter pattern — bring your own animation runtime (GSAP, Lottie, CSS, Three.js).
- Deterministic rendering — same input = identical output. Built for automated pipelines.
- AI-first design — not a bolted-on afterthought.
Quick Start
npx hyperframes init my-video
cd my-video
npx hyperframes dev # preview in browser
npx hyperframes render # render to MP4
Requirements: Node.js >= 22, FFmpeg
How It Works
Define your video as HTML with data attributes:
<div id="stage" data-composition-id="my-video" data-start="0" data-width="1920" data-height="1080">
<video
id="clip-1"
data-start="0"
data-duration="5"
data-track="0"
src="intro.mp4"
muted
playsinline
></video>
<img id="overlay" data-start="2" data-duration="3" data-track="1" src="logo.png" />
<audio
id="bg-music"
data-start="0"
data-duration="9"
data-track="2"
data-volume="0.5"
src="music.wav"
></audio>
</div>
Preview instantly in the browser. Render to MP4 locally. Let AI agents compose videos using tools they already understand.
Packages
| Package | Description |
|---|---|
hyperframes |
CLI — create, preview, lint, and render compositions |
@hyperframes/core |
Types, parsers, generators, linter, runtime, frame adapters |
@hyperframes/engine |
Seekable page-to-video capture engine (Puppeteer + FFmpeg) |
@hyperframes/producer |
Full rendering pipeline (capture + encode + audio mix) |
@hyperframes/studio |
Browser-based composition editor UI |
Documentation
Full docs at hyperframes.heygen.com — includes guides, concepts, API reference, and package documentation.
Contributing
See CONTRIBUTING.md for guidelines on how to contribute.
License
See LICENSE for details.