Miguel Ángel
dbddb0cbb3
The runtime set __renderReady at the same time as __playerReady, before the root timeline was bound. Consumers waiting for __renderReady (the render-safe signal) could observe a player with no captured timeline, making renderSeek a no-op. Root cause: init.ts set both flags together, but timeline binding happens later — synchronously via bindRootTimelineIfAvailable(), via a deferred setTimeout(0) for bundled compositions, or asynchronously via loadExternalCompositions(). Fix in init.ts: - Remove __renderReady from the __playerReady assignment - Set it after bindRootTimelineIfAvailable() when timeline is found - Set it in the setTimeout(0) deferred path - Set it in the external compositions .finally() path Fix in snapshot.ts: - Wait for __renderReady (truthful signal) not __timelines - Use renderSeek() with frame quantization, not seek() - Tick the GSAP ticker after seeking - Await document.fonts.ready before capturing Closes #1047
hyperframes
CLI for creating, previewing, and rendering HTML video compositions.
Install
npm install -g hyperframes
Or use directly with npx:
npx hyperframes <command>
Requirements: Node.js >= 22, FFmpeg
Commands
init
Scaffold a new Hyperframes project from a template:
npx hyperframes init my-video
cd my-video
preview
Start the live preview studio in your browser:
npx hyperframes preview
# Studio running at http://localhost:3002
npx hyperframes preview --port 4567
render
Render a composition to MP4:
npx hyperframes render ./my-composition.html -o output.mp4
lint
Validate your Hyperframes HTML:
npx hyperframes lint ./my-composition
npx hyperframes lint ./my-composition --json # JSON output for CI/tooling
npx hyperframes lint ./my-composition --verbose # Include info-level findings
By default only errors and warnings are shown. Use --verbose to also display informational findings (e.g., external script dependency notices). Use --json for machine-readable output with errorCount, warningCount, infoCount, and a findings array.
compositions
List compositions found in the current project:
npx hyperframes compositions
benchmark
Run rendering benchmarks:
npx hyperframes benchmark ./my-composition.html
doctor
Check your environment for required dependencies (Chrome, FFmpeg, Node.js):
npx hyperframes doctor
browser
Manage the bundled Chrome/Chromium installation:
npx hyperframes browser
info
Print version and environment info:
npx hyperframes info
docs
Open the documentation in your browser:
npx hyperframes docs
upgrade
Check for updates and show upgrade instructions:
npx hyperframes upgrade
npx hyperframes upgrade --check --json # machine-readable for agents
Documentation
Full documentation: hyperframes.heygen.com/packages/cli
Related packages
@hyperframes/core— types, parsers, frame adapters@hyperframes/engine— rendering engine@hyperframes/producer— render pipeline@hyperframes/studio— composition editor UI