* refactor(producer): extract HDR compositor from renderOrchestrator Move ~700 LOC of HDR compositing primitives (countNonZeroAlpha, countNonZeroRgb48, cropRgb48le, HdrVideoFrameSource, closeHdrVideoFrameSource, blitHdrVideoLayer, HdrImageBuffer, blitHdrImageLayer, CompositeTransfer, shouldUseLayeredComposite, resolveCompositeTransfer, HdrCompositeContext, compositeHdrFrame, HdrTransitionMeta, TransitionRange) into a dedicated hdrCompositor.ts module. Remove backward-compat re-exports from renderOrchestrator (hdrPerf, captureCost, shared) and rewire all import sites to the authoritative source modules. * refactor(producer): delete 4 re-export shim files screenshotService.ts, videoFrameExtractor.ts, videoFrameInjector.ts, and streamingEncoder.ts existed solely to re-export symbols from @hyperframes/engine. No internal consumer imported from them except index.ts → videoFrameInjector, which now imports directly from engine. * refactor(producer): delete unused PNG decode/blit worker pool The pool (455 LOC) and worker (127 LOC) were built speculatively for pipelining Chrome screenshots with PNG decode/blit but were never wired into any capture path. Zero non-test source files imported them. Also removed the esbuild entry point from producer/build.mjs, the tsup entry point + alpha-blit alias from cli/tsup.config.ts, and the PNG worker bootstrap from cli/src/cli.ts. * refactor(producer): centralize frame filename construction Replace 4 inline padStart(6) template literals with shared helpers: - formatCaptureFrameName(index, ext): zero-based, for internal capture - formatExportFrameName(index, ext): zero-based input, one-based output for user-facing png-sequence export * perf(producer): hoist allElementIds out of compositing loop Move fullStacking.map() from inside the per-layer iteration to before the loop, computing the element ID list once per frame instead of once per DOM layer per frame. * refactor(producer): consolidate HDR timing instrumentation * refactor(producer): remove typecasts and deduplicate HDR capture patterns - Extract seekInjectAndQueryStacking() and seekAndInject() helpers to deduplicate the seek+inject+query pattern across sequential loop, hybrid loop, and per-scene transition capture (3 call sites → 1 helper) - Fix sceneBuf as Buffer casts by properly typing the scene-capture arrays as [Buffer, Set<string>][] instead of using as const + cast - Replace as NonNullable<> cast on outputFormat with as const fallback - Add explanatory comments on inherent linkedom DOM casts * refactor(producer): name constants, type matrix, extract opacity helper - Replace magic 0.001/0.999 with TRANSFORM_IDENTITY_EPSILON and OPAQUE_ALPHA_THRESHOLD; replace BPP=6 with RGB48_BYTES_PER_PIXEL - Add AffineMatrix tuple type + isAffineMatrix guard, eliminating all 4 non-null assertions on matrix indices - Extract resolveBlitOpacity() to replace 5 identical ternaries - Narrow fallow-ignore-file to line-level complexity suppressions
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