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Vance Ingalls
730f7d4709
main added `scheduleMediaElementPlayback` -- a pitch-preserving HTMLMediaElement transport -- while this branch was open, and the runtime tries it FIRST for audio, falling back to the decoded-buffer path only when it returns null. The rebase therefore left every grouped track bypassing the very bus this branch exists to add: the new path connected its gain straight to master, while only the fallback went through `resolveDestination`. It now uses `resolveDestination` too, which is a no-op for an ungrouped element (it returns master) and the group's input gain for a member. Three `init.test.ts` cases spied on `decodeAudioElement` to assert WHICH audio elements get scheduled. That path is now the fallback, so the spies read zero through no fault of the behaviour under test — they move to `scheduleMediaElementPlayback`, with a comment saying why, and keep their original claims: a `data-hidden` clip is excluded under the `audio-track-mute` canary, still scheduled without it, and a two-clip un-hide is one reschedule. core's runtime suites pass (init 78, webAudioTransport 61).
@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