How to get id of active camera with javascript?

I have successfully used webrtc to bind a local camera to a html element. I have more than one camera connected to my pc.

How can I use javascript to find out the DeviceID of the camera, that is now in use?

Solution

Get the tracks from the MediaStream you get from getUserMedia, look at the label property. See https://github.com/webrtc/samples/blob/master/src/content/getusermedia/gum/js/main.js#L23 for a sample.