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https://github.com/heygen-com/hyperframes.git
synced 2026-09-03 04:38:33 +00:00
Miguel Ángel
0f938841cd
Two perf fixes caught in #1118 review: 1. Cache guard: probeAndCacheVolumeKeyframes now short-circuits when the element is already in volumeKeyframeCache. Without the guard every bindMediaMetadataListeners call (every 30 RAF ticks) re-probed all bound elements — N elements × full-composition timeline seeks at 60 Hz regardless of whether keyframes were already known. bindRootTimelineIfAvailable still clears the cache on a new timeline capture so keyframes stay fresh when the composition is rebound. 2. PCM cursor: audioVolumeEnvelope.ts had the incremental segment cursor (O(N+M) overall) before #1118 extracted the interpolation into interpolateVolumeGain. The shared function restarts from segment=0 on each call — fine for the preview path (one call per RAF tick) but O(N×M) for the PCM path (one call per sample: 48 kHz × duration). Napkin math: a 10-min render went from ~30M to ~460M ops. Restored the inline incremental scan in the engine bake loop; engine now only imports normaliseEnvelope from core.
@hyperframes/core
Types, parsers, generators, compiler, linter, runtime, and frame adapters for the Hyperframes video framework.
Install
npm install @hyperframes/core
Most users don't need to install core directly — the CLI, producer, and studio packages depend on it internally.
What's inside
| Module | Description |
|---|---|
| Types | TimelineElement, CompositionSpec, Asset, canvas dimensions, defaults |
| Parsers | parseHtml — extract timeline elements from HTML; parseGsapScript — parse GSAP animations |
| Generators | generateHyperframesHtml — produce valid Hyperframes HTML from a composition spec |
| Compiler | compileTimingAttrs — resolve data-start / data-duration into absolute times |
| Linter | lintHyperframeHtml — validate Hyperframes HTML (missing attributes, overlapping tracks, etc.) |
| Runtime | IIFE script injected into the browser — manages seek, media playback, and the window.__hf protocol |
| Frame Adapters | Pluggable animation drivers (GSAP, Lottie, CSS, or custom) |
Frame Adapters
A frame adapter tells the engine how to seek your animation to a specific frame:
import { createGSAPFrameAdapter } from "@hyperframes/core";
const adapter = createGSAPFrameAdapter({
getTimeline: () => gsap.timeline(),
compositionId: "my-video",
});
Implement FrameAdapter for custom animation runtimes:
import type { FrameAdapter } from "@hyperframes/core";
const myAdapter: FrameAdapter = {
id: "my-adapter",
getDurationFrames: () => 300,
seekFrame: (frame) => {
/* seek your animation */
},
};
Parsing and generating HTML
import { parseHtml, generateHyperframesHtml } from "@hyperframes/core";
const { elements, metadata } = parseHtml(htmlString);
const html = generateHyperframesHtml(spec);
Linting
import { lintHyperframeHtml } from "@hyperframes/core/lint";
const result = lintHyperframeHtml(htmlString);
// result.findings: { severity, message, elementId }[]
Documentation
Full documentation: hyperframes.heygen.com/packages/core
Related packages
@hyperframes/engine— rendering engine that drives the browser@hyperframes/producer— full render pipeline (capture + encode)hyperframes— CLI