Kagami/ffmpeg.js

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

3460 stars · 341 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

FFmpeg compiled to JavaScript/WebAssembly via Emscripten, optimized for in-browser use with WebM and MP4 builds plus Web Worker wrappers. It lets JavaScript applications run FFmpeg transcoding without a server, and also works in Node.

Use cases

• transcode video to webm or mp4 entirely in the browser
• run ffmpeg commands client-side without a backend
• extract audio from video files in a web app
• offload media encoding to a web worker
• convert uploaded video files before sending them to a server

When to choose

• you need client-side video/audio transcoding with no server round-trip
• you want a small, browser-optimized FFmpeg build for WebM or MP4
• you need the same FFmpeg code to run in both browser and Node

When to avoid

• you need codecs beyond the bundled WebM/MP4 builds
• you need actively maintained releases or the latest FFmpeg features
• you need high-performance native-speed encoding on a server

Facets

library · maturity maintenance

video-processing audio-processing wasm media web-development frontend browser wasm ffmpeg emscripten asm-js web-worker transcoding webm mp4 nodejs

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For agents

markdown · JSON · MCP: product_card(name="Kagami/ffmpeg.js")