**donut** is a zero setup required [SRT](https://en.wikipedia.org/wiki/Secure_Reliable_Transport) (_MPEG-TS_) and [RTMP](https://en.wikipedia.org/wiki/Real-Time_Messaging_Protocol) to [WebRTC](https://webrtc.org/) bridge powered by [Pion](http://pion.ly/). # HOW IT WORKS ```mermaid sequenceDiagram actor User box Cornsilk participant browser end User->>+browser: input protocol, host, port, id, and opts User->>+browser: click on [Connect] Note over donut,browser: WebRTC connection setup browser->>+browser: create WebRTC browserOffer browser->>+donut: POST /doSignaling {browserOffer} donut->>+browser: reply WebRTC {serverOffer} Note over donut,browser: WebRTC connection setup loop Async streaming donut--)streaming server: fetchMedia donut--)donut: ffmpeg::libav demux/transcode donut--)browser: sendWebRTCMedia browser--)browser: render audio/video frames User--)browser: watch media end ```  ref: [how donut works](/HOW_IT_WORKS.md) # QUICK START Make sure you have the `ffmpeg 5.x.x`. You must configure the CGO library path pointing it to **ffmpeg 5**. ```bash export CGO_LDFLAGS="-L/opt/homebrew/Cellar/ffmpeg@5/5.1.4_6/lib/" export CGO_CFLAGS="-I/opt/homebrew/Cellar/ffmpeg@5/5.1.4_6/include/" export PKG_CONFIG_PATH="/opt/homebrew/Cellar/ffmpeg@5/5.1.4_6/lib/pkgconfig" ``` Now you can install and run it: ```bash go install github.com/flavioribeiro/donut@latest donut ``` Here are specific instructions [to run on MacOS](/MAC_DEVELOPMENT.md). # RUN USING DOCKER-COMPOSE Alternatively, you can use `docker-compose` to simulate an [SRT live transmission and run the donut effortless](/DOCKER_DEVELOPMENT.md). ```bash make run ``` ## OPEN THE WEB UI Open [http://localhost:8080/demo](http://localhost:8080/demo). You will see two text fields. Fill them with the your streaming info and hit connect.  ### FAQ Please check the [FAQ](/FAQ.md) if you're facing any trouble.