donut

donut is a zero setup required SRT+MPEG-TS -> WebRTC Bridge powered by Pion. This fork operates in 2 possible modes:

1. as a viewer - providing a browser compatible endpoint for a single SRT stream. - useful for previews and testing.
2. as a bridge - providing a protocol translator to WHIP - useful for feeding SRT into SFUs or broadcast fanout systems

Install & Run Locally

Make sure you have the libsrt installed in your system. If not, follow their build instructions. Once you finish installing it, execute:

$ go install github.com/flavioribeiro/donut@latest

Once installed, execute donut. This will be in your $GOPATH/bin. The default will be ~/go/bin/donut

Run without args it works in viewer mode and springs up a webserver With -whip-uri and -srt-uri set it acts as a WHIP forwarder

Install & Run using Docker

Alternatively, you can build a docker image. Docker will take care of downloading the dependencies (including the libsrt) and compiling donut for you.

$ docker build -t donut .
$ docker run -it -p 8080:8080 donut

Open the Web UI for viewer

Open http://localhost:8080. You will see three text boxes. Fill in your details for your SRT listener configuration and hit connect.

Acting as a WHIP forwarder

This example requires port 5000 UDP to be open for inbound traffic

$ donut ./donut -whip-uri https://galene.pi.pe/group/whip/ -srt-uri "srt://0.0.0.0:5000?streamid=test" \
    -whip-token ${bearertoken}

You can then send multiple SRT streams to be forwarded as WHIP examples: Camera from a mac:

ffmpeg -f avfoundation  -framerate 30 -i "0" \
   -pix_fmt yuv420p -c:v libx264 -b:v 1000k -g 30 -keyint_min 120 -profile:v baseline \
   -preset veryfast -f mpegts  "srt://${bridgeIP}:5000?streamid=me"

Or from a raspi

ffmpeg -f video4linux2 -input_format h264 -video_size 1280x720 -framerate 30 \
-i /dev/video0 -vcodec copy -an -f mpegts "srt://${bridgeIP}:5000?streamid=picam"