Cenvero Cetus turns plain HTML compositions into MP4 and WebM. It bundles Chrome headless shell and ffmpeg, seeks every frame deterministically, and works with CSS, GSAP, video, WebGL, Three.js, and AI-generated scenes.
brew tap cenvero/cetus && brew install cenvero-cetus
curl -fsSL https://cetus.cenvero.org/install | sh
# Homebrew installs update with: brew update && brew upgrade cenvero-cetus
curl -fsSL https://cetus.cenvero.org/install | sh
curl -fsSL https://cetus.cenvero.org/install-beta | sh
# No system Chrome, Node.js, npm, or ffmpeg required.
irm https://cetus.cenvero.org/install.ps1 | iex
$env:CETUS_CHANNEL="beta"; irm https://cetus.cenvero.org/install.ps1 | iex
# Run from PowerShell. Installs cetus.exe and adds it to PATH.
Cetus gives designers, developers, and AI agents a stable render target: write one HTML file, preview it locally, then render exact frames into video.
Chrome headless shell and ffmpeg are embedded per platform and extracted once into ~/.cenvero-cetus.
Cetus seeks clips, CSS/Web Animations, GSAP timelines, media, custom hooks, fonts, images, and paint before capture.
Use HTML, CSS, video, canvas, WebGL, Three.js, and GSAP without React, Vite, Node.js, or a render farm.
The Build with AI tool generates prompts for ChatGPT, Codex, Claude Code, and terminal agents that produce valid Cetus HTML.
Pipe captured PNG frames into bundled ffmpeg and write H.264 MP4 or VP9 WebM from the same composition file.
Serve a composition locally with live reload, then render the exact same file from the command line.
Direct installs can run cetus update check and cetus update apply. Homebrew installs stay with Homebrew.
Installers use the release manifest, platform-specific archives, and SHA-256 checks before replacing the binary.
Keep width, height, duration, and FPS in the HTML root, or override FPS and dimensions from the CLI when needed.
# 1. Install Cetus curl -fsSL https://cetus.cenvero.org/install | sh # macOS Homebrew brew tap cenvero/cetus brew install cenvero-cetus
# 2. Preview while editing cetus preview cetus.html # Optional: generate a prompt open https://cetus.cenvero.org/build-with-ai/
# 3. Render MP4 or WebM cetus validate cetus.html cetus render cetus.html -o out.mp4 cetus render cetus.html -o out.webm # Override only when needed cetus render cetus.html -o out.mp4 --fps 60 cetus render cetus.html -o out.mp4 --audio music.mp3 --audio-volume 0.7 --audio-loop cetus render cetus.html -o out.mp4 --resume --frames-dir .cetus-frames --concurrency 4
# 4. Keep it current cetus update check cetus update apply # Verify the installed binary cetus version