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Vance IngallsandClaude Opus 5
4520cd240b
Three review findings on the win32 drawElement PR: 1. gpu_renderer shipped the raw UNMASKED_RENDERER_WEBGL string — unbounded, driver-authored, GPU-model-specific, and |-joined across parallel sessions, i.e. high cardinality by construction, against this file's own convention of sanitizing engine-sourced strings (deGateReason is a bucket; error messages go through redactTelemetryString). Now bucketed at the source by classifyGpuRenderer to <backend>/<vendor> (metal/apple, d3d11/nvidia, swiftshader/other, ...), which is the whole analytic signal the win32 rollout needs and nothing else. The raw string never leaves the engine. 2. gpu_renderer reached render_complete only, so a crashed render — the cohort the field exists to attribute — carried no backend. It now rides RenderCaptureObservability (deGpuRenderer, sourced from the live probe session like the de_* counters), so both render_complete and render_error carry it and a hard failure still reports its GPU backend. On render_complete the perfSummary value still wins by spread order. 3. Restore the fallow-ignore-next-line suppression above __resetDeParallelRouterTrialStateForTests: CLI test files are not fallow entry points, so removing it fails the CI dead-code audit (local pre-commit passed only because of its changed-file scope). Co-Authored-By: Claude Opus 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