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xiayeandClaude Opus 4.7
5a0966dfeb
The audio-locked attribute was correctly setting `muted = true` and posting `set-muted` to the iframe runtime, but on warm-cache reloads of claude.ai and inside the Claude desktop Electron client, the iframe finishes loading *after* the parent has already sent control messages — the iframe runtime's postMessage listener isn't installed yet, so the messages are silently dropped. Audio plays unmuted with no UI to recover. Confirmed via: - "First open" on claude.ai: cold cache, iframe slow → listener up before `set-muted` lands → audio muted ✅ - "Hard refresh" on claude.ai: warm cache, iframe fast → listener up after message arrives → message lost → audio plays ❌ - Claude desktop: Electron renderer consistently fast → race always loses → audio plays ❌ Fix: add a `{source: "hf-preview", type: "ready"}` event the runtime emits once `installRuntimeControlBridge` has registered the listener. The player listens for it and replays current bridge state (`set-muted`, `set-volume`, `set-playback-rate`). Pre-ready messages are now safe to send — they'll be replayed once the runtime can receive them. The replay is idempotent — re-asserting defaults is a no-op — so it's also safe across iframe reloads (new runtime instance emits ready again). Tests: 6 new (1 bridge: ready posted on install; 5 player: replays muted / volume / playback-rate / audio-locked-forced-mute / handles second ready / ignores ready from wrong source). Suites green: core 1387, player 137. Refs: - Investigation: heygen-com/hyperframes#1300 (UA-fallback attempt — unrelated to actual root cause) - claude.ai-web.log analysis revealed cross-origin iframe + race condition, not attribute stripping as originally hypothesized 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
@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