HyperFrames turns plain HTML into finished MP4 video, and it is built for agents

HeyGen's open-source HyperFrames framework renders video from plain HTML compositions, pairing a seekable animation runtime with headless Chrome capture and FFmpeg encoding. The authoring model is deliberately simple: an HTML file whose DOM declares timing through data-* attributes, with animation adapters for GSAP, Lottie, Three.js, and Anime.js. Around the core engine sits a full CLI workflow — init, lint, preview, render, publish — plus TTS voiceover, background music, transcription, and captions. It has crossed 65,000 GitHub stars, ships 21 agent skills and a Claude Code plugin, and is used in production at HeyGen with adopters like tldraw and TanStack named in the README, positioning itself directly against Remotion: plain HTML instead of React.

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