rtp-forwarder is a simple application that shows how to forward your webcam/microphone via RTP using Pion WebRTC.


Download rtp-forwarder

export GO111MODULE=on
go get github.com/pion/webrtc/v3/examples/rtp-forwarder

Open rtp-forwarder example page

jsfiddle.net you should see your Webcam, two text-areas and Copy browser SDP to clipboard, Start Session buttons

Run rtp-forwarder, 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.


Run echo $BROWSER_SDP | rtp-forwarder


  1. Paste the SessionDescription into a file.
  2. Run rtp-forwarder < my_file

Input rtp-forwarder’s SessionDescription into your browser

Copy the text that rtp-forwarder just emitted and copy into second text area

Hit ‘Start Session’ in jsfiddle and enjoy your RTP forwarded stream!

You can run any of these commands at anytime. The media is live/stateless, you can switch commands without restarting Pion.


Open rtp-forwarder.sdp with VLC and enjoy your live video!


Run ffprobe -i rtp-forwarder.sdp -protocol_whitelist file,udp,rtp to get more details about your streams

Run ffplay -i rtp-forwarder.sdp -protocol_whitelist file,udp,rtp to play your streams

You can add -fflags nobuffer -flags low_delay -framedrop to lower the latency. You will have worse playback in networks with jitter. Read about minimizing the delay on Stackoverflow.


ffmpeg -protocol_whitelist file,udp,rtp -i rtp-forwarder.sdp -c:v libx264 -preset veryfast -b:v 3000k -maxrate 3000k -bufsize 6000k -pix_fmt yuv420p -g 50 -c:a aac -b:a 160k -ac 2 -ar 44100 -f flv rtmp://live.twitch.tv/app/$STREAM_KEY Make sure to replace $STREAM_KEY at the end of the URL first.


View Github