Miguel Ángel
0bf15119f8
Compositions are now self-contained: the compiler captures font files and embeds them as woff2 data URIs, eliminating silent render-time fallback when the render environment lacks the author's fonts. Resolution order (each tier falls through to the next): 1. Existing @font-face → use as-is 2. Bundled alias (38 cross-platform mappings) → embed data URI 3. Google Fonts → fetch, cache, embed 4. Local system font → locate on OS, compress to woff2, embed 5. Local @font-face paths → read file, compress, inline as data URI 6. External CDN stylesheets → fetch CSS, extract @font-face, inline 7. Alias map fallback → closest bundled equivalent 8. Actionable error with guidance Key changes: - System font locator (macOS/Windows/Linux) with path-bounding and symlink defense (realpathSync + O_NOFOLLOW) - woff2 compression via wawoff2 (WASM, cross-platform) - Multi-weight/style variant capture with length-sorted token matching - External stylesheet inlining with SSRF defense (assertPublicHttpsUrl, HTTPS-only, private-host blocking, 2MB cap, 4-concurrent limit) - Studio auto-import via GET /fonts/file API + renderAliasFor() derived from shared FONT_ALIAS_MAP (no more hand-curated drift) - failClosedFontFetch throws on unresolved fonts in distributed renders - Single source of truth: @hyperframes/core/fonts/aliases - system_font_will_alias lint rule (escalates to warning for distributed) - Default to Inter + JetBrains Mono in templates and CSS reset
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