ffmpeg.sh#

Small, LGPL-friendly FFmpeg and FFprobe WebAssembly for local media automation.

Media Bench playground

What It Is#

ffmpeg-wasm builds a narrow FFmpeg core for Node 24+ and wraps it with predictable CLI and TypeScript APIs. It is meant for local tools that need media probing, audio extraction, thumbnails, raw frame output, stream-copy clips, and segmentation without shipping a full native FFmpeg bundle.

Fast Path#

pnpm install
pnpm build
pnpm playground

Then open http://127.0.0.1:4173, load a video or the generated sample, pick an operation, render, preview inline, and save the output.

Feature Docs#

Install
Build surface
TypeScript API
CLI
Media playground
Recipes
Licensing
CI and verification
Domains

Project#

The wrapper, docs, and scripts are MIT licensed. Generated FFmpeg assets are LGPL-2.1-or-later and copied with their license files during pnpm build.