Push local WebRTC stream to a NodeJS server in the cloud - node.js

Question

I have a task, but I can't seem to get it done.
I've created a very simple WebRTC stream on a Raspberry Pi which will function as a videochat-camera.
With ionic I made a simple mobile application which can display my WebRTC stream when the phone is connected to the same network. This all works.
So right now I have my own local stream which shows on my app.
I now want to be able to broadcast this stream from my phone to a live server, so other people can spectate it.
I know how to create a NodeJS server which deploys my webcam with the 'getUserMedia' function. But I want to 'push' my WebRTC stream to a live server so I can retrieve a public URL for it.
Is there a way to push my local Websocket to a live environment?
I'm using a local RTCPeerConnection to create a MediaStream object
this.peerconnection = new RTCPeerConnection(this.peerservers);
this.peerconnection.onicecandidate = (event) => {
if (event.candidate && event.candidate.candidate) {
var candidate = {
sdpMLineIndex: event.candidate.sdpMLineIndex,
sdpMid: event.candidate.sdpMid,
candidate: event.candidate.candidate
};
var request = {
what: "addIceCandidate",
data: JSON.stringify(candidate)
};
this.websockets.send(JSON.stringify(request));
} else {
console.log("End of candidates.");
}
};
And to bind the stream object to my HTML Video tag I'm using this
onTrack(event) {
this.remoteVideo.srcObject = event.streams[0];
}
My stream url is something like: MyLocalIP:port/streams/webrtc
So I want to create a public URL out of it to broadcast it.

Answer 1

Is there a way to push my local Websocket to a live environment?
It's not straightforward because you need more than vanilla webrtc (which is peer-to-peer). What you want is an SFU. Take a look at mediasoup.
To realize why this is needed think about how the webrtc connection is established in your current app. It's a negotiation between two parties (facilitated by a signaling server). In order to turn this into a multi-cast setup you will need a proxy of sorts that then establishes separate peer-to-peer connections to all senders and receivers.

Answer 2

You can do it with Socket.io & WebRTC, see the sample here
var offerer = new PeerConnection('http://domain:port', 'message', 'offerer');
offerer.onStreamAdded = function(e) {
document.body.appendChild(e.mediaElement);
};
var answerer = new PeerConnection('http://domain:port', 'message', 'answerer');
answerer.onStreamAdded = function(e) {
document.body.appendChild(e.mediaElement);
};
answerer.sendParticipationRequest('offerer');