A retro-styled, browser-native FFmpeg sandbox that spits out dummy clips for QA/SDET workflows. Everything renders on your machine - zero uploads, zero backend.

Highlights

• 🎥 Generate MP4/WebM clips with custom resolution (up to 7680x4320), background color, and animated edge-bouncing text.
• 🧪 Built for QA/SDET: predictable frames (6 fps), easy aspect labels, repeatable renders for player/CDN/UI regression tests.
• 🛡️ Fully local: FFmpeg ships as WebAssembly and loads during idle time; renders never leave the browser.
• 🧭 Guided tour + retro UI: @zag-js tour, tactile controls, instant aspect + validation via RHF + Zod.
• ⚡ Zero setup: no system ffmpeg, no server; works offline after the first core download.

Why FFmpeg in the browser?

• Moving FFmpeg from servers/CI into the tab kills queues, API limits, and data exfiltration risk.
• QA can A/B player behavior on real devices with production-like codecs without provisioning infra.
• Latency drops to zero: iterate by typing - rendering - playing, all inside the browser.

Using the tool

• Video Settings: width/height, text, hex background, choose MP4 (H.264) or WebM (VP8).
• Generate: button switches to “Regenerate Video” after the first render.
• Preview: aspect-ratio-safe canvas; playback stays in-page.
• Download: name your file and save locally.
• Tour & info: “?” restarts the tour; “i” explains the local-only pipeline.

How it works

• @ffmpeg/ffmpeg + @ffmpeg/util load the wasm core via toBlobURL, cached in-memory.
• Renders are pure FFmpeg CLI: lavfi color source + drawtext animation along all four edges.
• Validation by react-hook-form + Zod; retro controls built with @zag-js primitives and Tailwind.

License

MIT © Igor Klepacki / neg4n