Miguel Ángel
5a25298263
Three changes to make TTS (and all model downloads) more reliable: 1. download.ts: add retry with exponential backoff (3 retries), socket and response timeouts, redirect loop protection, and specific HTTP 403/429 (rate limit) error messages. This fixes the primary failure mode: GitHub Releases rate-limiting model downloads at scale. 2. tts/manager.ts: add file-level locking (.lock files) for model and voice downloads to prevent concurrent processes from racing on the same .tmp file. The lock is stale-checked after 5 minutes. 3. tts/synthesize.ts: increase hasPythonPackage timeout from 10s to 30s (ONNX runtime cold import exceeds 10s on constrained machines), and set maxBuffer to 10 MB (ONNX prints verbose warnings that can exceed the 1 MB default, killing the subprocess). The download retry also benefits whisper (transcribe) and background-removal commands which share the same download utility. PostHog data: TTS failure rate hit 61% on June 2 when usage spiked 3x.
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