# swap-tracks
swap-tracks demonstrates how to swap multiple incoming tracks on a single outgoing track.

## Instructions
### Download swap-tracks
```
go install github.com/pion/webrtc/v4/examples/swap-tracks@latest
```

### Open swap-tracks example page
[jsfiddle.net](https://jsfiddle.net/1rx5on86/) you should see two text-areas and two buttons: `Copy browser SDP to clipboard`, `Start Session`.

### Run swap-tracks, with your browsers SessionDescription as stdin
In the jsfiddle the top textarea is your browser's Session Description. Press `Copy browser SDP to clipboard` or copy the base64 string manually.
We will use this value in the next step.

#### Linux/macOS
Run `echo $BROWSER_SDP | swap-tracks`
#### Windows
1. Paste the SessionDescription into a file.
1. Run `swap-tracks < my_file`

### Input swap-tracks's SessionDescription into your browser
Copy the text that `swap-tracks` just emitted and copy into second text area

### Hit 'Start Session' in jsfiddle, enjoy your video!
Your browser should send streams to Pion, and then a stream will be relayed back, changing every 5 seconds.

Congrats, you have used Pion WebRTC! Now start building something cool