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miga-heygenandClaude Opus 4.6
546b2d770b
* fix(producer): retry probe stage on transient browser errors (#1687) The distributed render plan stage crashes when headless Chrome encounters a transient frame detachment ("Navigating frame was detached") during browser probe, with no retry logic. The plan tarball is never uploaded, and all downstream chunk workers fail with S3 404. Add a retry-with-fresh-session mechanism to the probe stage: - `isTransientBrowserError()` classifier in the engine identifies 9 known transient Puppeteer/Chrome errors (frame detached, target closed, session closed, protocol error, page crashed, execution context destroyed, etc.). - `runProbeStage()` wraps browser session creation + initialization in a retry loop (max 2 attempts). On transient error: logs structured diagnostics (attempt, isTransient, error message, elapsed time), closes the crashed session cleanly, creates a fresh browser, and retries. Non- transient errors throw immediately without consuming retry budget. - 17 unit tests for the error classifier, 3 integration tests for retry behavior (successful retry, immediate throw on non-transient, exhaust retry budget on persistent transient). Closes #1687 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * fix: address review feedback — widen retry scope, deduplicate patterns - Move createCaptureSession inside the retry try/catch so browser launch failures (Failed to launch the browser process, ECONNREFUSED) are also retried — not just initializeSession errors. - Deduplicate transient error patterns: remove "Protocol error.*Target closed" (subsumed by "Target closed") and "Navigation failed because browser has disconnected" (subsumed by "browser has disconnected"). - Add browser launch failure patterns: "Failed to launch the browser process" and "ECONNREFUSED". - Add test for createCaptureSession transient throw (browser launch retry). - Update test mock comment to document sync requirement with engine pattern list. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.6 (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,
releaseBrowser,
createCaptureSession,
initializeSession,
captureFrame,
closeCaptureSession,
} from "@hyperframes/engine";
// 1. Launch browser
const browser = await acquireBrowser({ captureMode: "beginFrame" });
// 2. Open a capture session
const session = createCaptureSession({
browser: browser.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 releaseBrowser(browser);
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