mirror of
https://github.com/heygen-com/hyperframes.git
synced 2026-09-01 19:42:03 +00:00
JamesandClaude Opus 4.7
2d6372ac2a
Part of Phase 2 of the distributed rendering plan (determinism hardening). See DISTRIBUTED-RENDERING-PLAN.md §7.1 and §17.2 (gating table). Adds two optional fields to EncoderOptions: lockGopForChunkConcat?: boolean // default false gopSize?: number // required when lockGopForChunkConcat=true When the flag is true on the SW libx264 / libx265 paths, buildEncoderArgs emits closed-GOP / forced-keyframe args so the resulting chunk file can be losslessly concatenated (`ffmpeg -f concat -c copy`) with sibling chunks: -g <gopSize> -keyint_min <gopSize> -sc_threshold 0 -force_key_frames "expr:eq(mod(n,<gopSize>),0)" -x264-params "...:scenecut=0:open-gop=0:repeat-headers=1" -x265-params "keyint=<gopSize>:min-keyint=<gopSize>:scenecut=0:open-gop=0:repeat-headers=1" -bf 0 (added for h265 too when locked) GPU encoders, vp9, and prores ignore the flag (their concat-copy story is separate — see plan §7.2 / §8). In-process behavior is unchanged: the default (false) path emits no new args. New unit tests pin both branches in packages/engine/src/services/ chunkEncoder.test.ts. This is part of a stack of 10 PRs; this is PR 1 of 10. Co-Authored-By: Claude Opus 4.7 (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