selfTest.html

<!-- video A views the user's camera directly -->
<video id="videoA" autoplay></video>
<!-- video B views the user's camera through an RTC connection -->
<video id="videoB" autoplay></video>
<script>
	//polyfills
	var RTCPeerConnection = RTCPeerConnection || webkitRTCPeerConnection || mozRTCPeerConnection;
	navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
	
	//request & load user's stream into videoA
	navigator.getUserMedia({video: true}, function(stream) {
		videoA.src = URL.createObjectURL(stream);
	
		//set up the "local" connection, connectionA
		var connectionA = new RTCPeerConnection(null);
		connectionA.onicecandidate = function(event) {
			//give A's ICE candidate to B
			if (event.candidate)
				connectionB.addIceCandidate(new RTCIceCandidate(event.candidate));
		};
		
		//set up the "remote" connection, connectionB
		var connectionB = new RTCPeerConnection(null);
		connectionB.onicecandidate = function(event) {
			//give B's ICE candidate to A
			if (event.candidate)
				connectionA.addIceCandidate(new RTCIceCandidate(event.candidate));
		};
		connectionB.onaddstream = function(event) {
			//after connection is made, load the stream into videoB
			videoB.src = URL.createObjectURL(event.stream);
		};
		
		//set the data sent by connectionA to be the user's video.
		connectionA.addStream(stream);
		
		//exchange of SDP, started with an offer
		connectionA.createOffer(function(descriptionA) {
			//this begins generation of ICE candidates for A:
			connectionA.setLocalDescription(descriptionA);
			//and describes them to B
			connectionB.setRemoteDescription(descriptionA);
			//exchange of SDP, finished with an answer
			connectionB.createAnswer(function(descriptionB) {
				//this begins generation of ICE candidates for B:
				connectionB.setLocalDescription(descriptionB);
				//and describes them to A
				connectionA.setRemoteDescription(descriptionB);
			});
		});
		
	}, function(error) {console.log('failure:', error);});
	
</script>