miga-heygen
5a95211e36
## What
`check`'s sweep_static guard false-positives on a composition that swaps between equal-size, equal-position opaque `<img>` elements — a common authoring pattern for revealing frame N of a still sequence from a paused GSAP cursor. The render itself is correct; only `check`'s verdict is wrong.
## Why
The sweep guard fingerprints every visible element's box + opacity + font-variation-settings per seeked sample. That's deliberately blind to pixel-only motion (a canvas repainting, a video playing) with no element moving, so an existing carve-out downsamples each visible `canvas`/`video` to 8x8 and folds its pixels into the fingerprint specifically to catch that class of motion.
That carve-out's element selector (`root.querySelectorAll("canvas, video")`) never included `img`. An img src/visibility swap between equal-size opaque images moves zero geometry and zero opacity, so it stays outside both the base fingerprint and the pixel-hash carve-out — the whole-run fingerprint reads byte-identical across every sample and `sweep_static` fires on an animating composition.
## How
Widened the selector to `canvas, video, img`. No other change was needed: `mediaPixelHash` already handles `img` correctly — `drawImage` accepts any `CanvasImageSource`, and its width/height detection already falls back to the element's bounding rect the same way it does for `canvas`/`video`.
**Scope note:** this repo has an open PR (#3707) touching the same function (`collectLayoutGeometry` in this same file) for a different, unrelated bug (text/counter fingerprinting). This change is deliberately isolated to the `canvas, video` → `canvas, video, img` selector line and a new comment above it — verified against #3707's current diff that neither touches this exact loop, so the two PRs shouldn't conflict regardless of merge order.
## Testing
Added a test mirroring the existing "changes the sweep fingerprint when visible video pixels advance" test, using an `<img>` element instead of `<video>` with the same pixel-mock approach.
- `bunx tsc --noEmit` in `packages/cli` — clean
- `bunx oxlint` / `bunx oxfmt --write` on changed files — clean, no changes needed
- Full CLI suite (excluding known-broken browser-launch tests unrelated to this change): 217 test files / 3023 tests passing
One local-environment caveat, disclosed for transparency: `layout-audit.browser.test.ts` (the file the new test lives in) can't execute in my local sandbox — it fails identically with or without this change (`No such built-in module: node:`, a happy-dom + Vite externalization issue affecting every test file in this repo that imports Node builtins at the top under `@vitest-environment happy-dom`, not specific to this change). I verified the new test's logic and mocking approach are structurally identical to the existing, CI-passing video test it's modeled on, and will confirm via this PR's CI run rather than a local one.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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: http://localhost:3002/#project/my-video
# Server: http://localhost:3002
npx hyperframes preview --port 4567
In an interactive terminal, the preview stays attached until you press
Ctrl+C. In a non-interactive shell such as a coding-agent session, the same
command starts a managed preview that survives after the command returns. Use
--background or --foreground to choose explicitly, and manage persistent
previews with --status, --stop, --list, and --kill-all. Add --json to
managed lifecycle commands for machine-readable output. --foreground --json
prints the ready-session envelope once, then remains attached until stopped.
normalize-audio
Measure two local authored audio clips with integrated LUFS and match the target
to the unchanged reference. The command is a dry run unless --write is passed:
npx hyperframes normalize-audio --reference target-audio --target user-audio
npx hyperframes normalize-audio --reference target-audio --target user-audio --write
It updates only the target element's data-volume and refuses unsafe boosts
that exceed Studio's +12 dB ceiling or would clip.
render
Render a composition to MP4. Run from the project directory; the positional
argument is the project directory (not a file), so render the project's
index.html directly, or point at a specific composition file with -c:
npx hyperframes render -o output.mp4
npx hyperframes render -c ./my-composition.html -o output.mp4
publish
Upload a project directory and get a hosted URL that keeps working after the CLI exits. Published projects are private by default:
npx hyperframes publish
npx hyperframes publish ./my-video
npx hyperframes publish --public
npx hyperframes publish --yes
Signed-out publishing returns an authentication-required claim URL; opening it
lets someone sign in and claim the project. Sign in first with
npx hyperframes auth login to publish an owned project you can update. Use
--public to make the claimed project visible to anyone. --yes only skips the
confirmation prompt and does not change visibility.
Signed-in publishers can use --update <url-or-id> to target an existing project
or --space <space-id> to publish into a shared team space. If the requested
project is missing or inaccessible, publishing can create a new project instead;
check the printed URL and status.
See the publish reference for all options, including video proxy settings.
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