mirror of
https://github.com/heygen-com/hyperframes.git
synced 2026-10-30 17:27:09 +00:00
Miguel Ángel
70fbe32f8d
* perf(producer): assemble chunks that carry audio under one faststart index Reads each chunk's moov, merges the sample tables into one moov at the front, and writes the chunks' mdat payloads after it unchanged: the same bytes storage can copy into place. The assembler no longer needs the plan audio for such plans. * perf(aws-lambda): build the final mp4 inside S3 with its index up front The Lambda plan asks chunks to carry their audio. Assemble writes the faststart header as part 1 of a multipart upload and copies each chunk's mdat payload with UploadPartCopy, so the video bytes never pass through the function; any failure aborts the upload. * fix(engine): a chunk's first frame shows its own time, not the composition's opening frame * fix(producer): stitch silent AAC tails and clean failed outputs * fix(producer): open stitched chunks read-only with an explicit mode * chore(aws-lambda): raise the package size budget for S3-side MP4 assembly handler.js and index.js each bundle the new S3 stitch code (+5,550 bytes apiece) and s3Stitch.d.ts adds 970: +3,479 packed and +12,070 unpacked over main, measured with the CI pack. The budget rises by exactly that delta. * fix(aws-lambda): v1 plans give chunks their audio too, so both protocols match * perf(producer): plans whose chunks carry audio encode it once, at the frames' exact length * test(producer): terminate the plan audio ffprobe argv like every other probe
@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