In order to retrieve the list of possible microphone/camera sources to select from, you can use the MediaStreamTrack.getSources function after which you can set the selected camera id as a "sourceId" constraint on getUserMedia.

 Please refer to our demo and source code for a working example 

Note : The above sample uses Temasys's version of AdapterJS, that is a polyfill that wraps around each browser and provides a standard API to use. We would highly recommend using the latest version of the Temasys WebRTC plugin with the latest version of AdapterJS. ( Reference : )