Virtual time engine to record HTML to 60fps MP4, no drops
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HN · launched Jul 26, 2026 · 5 upvotes (top 89%) · 0 views
Niche: video production and processing tools · 243 launches, 40 in the last 7 days ▲ +60% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 243 launches in video production and processing tools →
Could you build this?
Partial A website offering HTML-to-MP4 video conversion is simple, but building a virtual time deterministic rendering engine that intercepts browser animation ticks (requestAnimationFrame, CSS animations, Web Animations API) without frame drops is technically non-trivial.
What it would actually take: The engine uses headless Chromium (via Puppeteer/Playwright or CDP) injecting a custom virtual time override that monkey-patches `performance.now`, `Date.now`, `requestAnimationFrame`, and CSS animation timelines. It steps through time frame-by-frame, capturing raw pixel buffers (via CDP `Page.captureScreenshot` or screencast streams) and piping them into an FFmpeg encoder process.
Discussion
2 comments analyzed.
Competitors mentioned: webmotion.superhq.ai
Concerns raised: Browser not designed for time freezing, audio/video/CSS cannot be effectively paused, Virtual time engine concept similarity to existing product
Competitors
Other products that read as similar to this one : 947 launches clear the similarity bar, closest 8 shown.
Attention rank: #858 of 948 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 270 days after the earliest competitor.
- HTML2Video · ph · 2026-11-12 · 1 upvotes · similarity 0.59
- chrome-capture · github · 2026-11-08 · 372 upvotes · similarity 0.56
- Rendering 18,000 videos in real-time with Python · hn · 2026-02-22 · 49 upvotes · similarity 0.55
- HTML TO MOTION · ph · 2026-10-26 · 2 upvotes · similarity 0.51
- windvd-media-player · github · 2026-11-10 · 102 upvotes · similarity 0.50
- Framelet · ph · 2026-10-14 · 2 upvotes · similarity 0.49
- three-motionbricks · github · 2026-10-29 · 21 upvotes · similarity 0.49
- WPE2M · github · 2026-11-06 · 26 upvotes · similarity 0.49
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.