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James RussoandClaude Opus 5.5
f55b366175
* fix(build): ship NodeNext-resolvable declarations from every package tsc copies relative specifiers verbatim, so packages whose sources use bundler-style extensionless imports (core, inspector) published .d.ts files that a module/moduleResolution nodenext consumer cannot resolve. Core already rewrote its emitted JavaScript for this, but not its declarations. Move that rewrite to scripts/rewrite-relative-import-extensions.mjs, make it cover .d.ts too (adding .js or /index.js, and failing the build when a declaration import has no declaration), and run it after every tsc emit: core, engine, sdk, producer, aws-lambda, gcp-cloud-run and inspector. verify:packed-manifests now typechecks the clean packed consumer with skipLibCheck false and type-only imports of every typed subpath, so an unresolvable import inside a published declaration fails the gate and is attributed to its package. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> * chore(ci): allow the moved core rewrite-esm-extensions script deletion Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> * ci: rebuild the edit-accuracy bench when the import-extension rewriter changes The package builds now run scripts/rewrite-relative-import-extensions.mjs, so main's edit_accuracy paths filter has to include it (check-edit-accuracy-filter test). Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
@hyperframes/engine
Seekable web-page-to-video rendering engine built on Puppeteer and FFmpeg.
Framework-agnostic: works with GSAP, Lottie, Three.js, CSS animations, or any web content that implements the window.__hf seek protocol.
Install
npm install @hyperframes/engine
Requirements: Node.js >= 22, Chrome/Chromium (auto-downloaded by Puppeteer), FFmpeg
What it does
The engine opens your HTML composition in a headless Chrome instance, seeks frame-by-frame using Chrome's HeadlessExperimental.beginFrame API, captures screenshots, and encodes them into video with FFmpeg.
Key services
| Service | Description |
|---|---|
| browserManager | Launches and pools headless Chrome instances (chrome-headless-shell) |
| frameCapture | Manages capture sessions — seek, screenshot, buffer lifecycle |
| screenshotService | BeginFrame-based capture with CDP (Chrome DevTools Protocol) |
| chunkEncoder | FFmpeg encoding with chunked concat, GPU detection, faststart |
| streamingEncoder | Pipe frames to FFmpeg in real time (no intermediate PNGs on disk) |
| audioMixer | Parse <audio> elements and mix audio tracks via FFmpeg |
| videoFrameExtractor | Extract frames from <video> elements for compositing |
| parallelCoordinator | Split frame ranges across worker processes |
| fileServer | Serve local HTML files to the browser via Hono |
Usage
import {
acquireBrowser,
createCaptureSession,
initializeSession,
captureFrame,
closeCaptureSession,
} from "@hyperframes/engine";
// 1. Launch browser
const browserLease = await acquireBrowser({ captureMode: "beginFrame" });
// 2. Open a capture session
const session = createCaptureSession({
browser: browserLease.browser,
url: "http://localhost:3000/my-composition.html",
width: 1920,
height: 1080,
fps: 30,
});
await initializeSession(session);
// 3. Capture frames
for (let i = 0; i < totalFrames; i++) {
await captureFrame(session, i, `/tmp/frames/frame-${i}.png`);
}
// 4. Clean up
await closeCaptureSession(session);
await browserLease.release();
Most users should use @hyperframes/producer or the hyperframes CLI instead of calling the engine directly.
Documentation
Full documentation: hyperframes.heygen.com/packages/engine
Related packages
@hyperframes/core— types, parsers, frame adapters@hyperframes/producer— high-level render pipeline built on this enginehyperframes— CLI