HeyGen open-sources HyperFrames: deterministic HTML-to-MP4 video pipelines with an agent skill pack
lmoroney · x · 2026-10-03
HeyGen has open-sourced HyperFrames under Apache 2.0: you author videos in HTML/CSS with seekable animations (GSAP, Lottie, Three.js), a headless browser captures each frame, and FFmpeg encodes a deterministic MP4—same input, same frames, enabling CI and regression tests. Timing lives in data attributes, and an agent skill pack covers workflows like product-launch clips and PR-to-video explainers. The poster advises treating composition as source code: preview, lint, tweak one element, render again.
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