[Source Code](https://github.com/ffmpegjs/ffmpeg.js/blob/master/examples/browser/transcode.html)
## Examples:
| Name | Demo | Source Code |
| ---- | ------- | ----------- |
| Webcam | | [Link](https://github.com/ffmpegjs/ffmpeg.js/blob/master/examples/browser/webcam.html) |
---
ffmpeg.js provides simple to use APIs, to transcode a video you only need few lines of code:
```javascript
const fs = require('fs');
const { createWorker } = require('@ffmpeg/ffmpeg');
const worker = createWorker();
(async () => {
await worker.load();
await worker.write('test.avi', './test.avi');
await worker.transcode('test.avi', 'test.mp4');
const { data } = await worker.read('test.mp4');
fs.writeFileSync('./test.mp4', data);
})();
```
## Installation
```
$ npm install @ffmpeg/ffmpeg
```
> As we use `worker_threads` which was introduced in Node.js v10.5.0, please remember to add `--experimental-worker` if you are using Node.js v10, and you don't have to add anything if you are using Node.js v12
## Documentation
- [API](https://github.com/ffmpegjs/ffmpeg.js/blob/master/docs/api.md)
## Tutorials
Learn how to build ffmpeg.js from stories:
- [Part.1 Preparation](https://itnext.io/build-ffmpeg-webassembly-version-ffmpeg-js-part-1-preparation-ed12bf4c8fac)
- [Part.2 Compile with Emscripten](https://itnext.io/build-ffmpeg-webassembly-version-ffmpeg-js-part-2-compile-with-emscripten-4c581e8c9a16)
- [Part.3 ffmpeg.js v0.1.0 — Transcoding avi to mp4](https://itnext.io/build-ffmpeg-webassembly-version-ffmpeg-js-part-3-ffmpeg-js-v0-1-0-transcoding-avi-to-mp4-f729e503a397)
- [Part.4 ffmpeg.js v0.2 — Web Worker and Libx264](https://medium.com/@jeromewus/build-ffmpeg-webassembly-version-ffmpeg-js-part-4-ffmpeg-js-v0-2-web-worker-and-libx264-d0596f1beb4e)
- [Part.5 ffmpeg.js v0.3 — pre-js and live streaming](https://medium.com/@jeromewus/build-ffmpeg-webassembly-version-ffmpeg-js-part-5-ffmpeg-js-v0-3-pre-js-and-live-streaming-c1498939a74c)
- [Part.6 a Deep Dive into File System](https://medium.com/@jeromewus/build-ffmpeg-webassembly-version-ffmpeg-js-part-6-a-deep-dive-into-file-system-56eba10067ca)