Chrome Version       : Version 49.0.2623.87 m
URLs (if applicable) :
Other browsers tested: none

OS = Windows 7 FAmily


What steps will reproduce the problem?
(1) go to url 192.168.1.12:8080/wPda (this is an application)
(2) The page served by the application lists all cameras on the pc
(3) The user selects one camera (from a select box previously populated
(4) navigator.webkitGetUserMedia() is invvoked as follows (where videoSource is the id (device.deviceId) of the camera as follows:
function startSelectedCamera(videoSource) {
	var constraints = {
		    audio:  false,
		    video: {
		      optional: [
		        {sourceId: videoSource}
		                                 ]
		    }
		  };
                     navigator.getUserMedia(  constraints,
					      function(stream) {
						  videoStream = stream;
						  // Stream the data
						  video.src = createSrc(stream);
						  video.play();
						},
						function(error) {
						    	  alert('Starting video error: '+ error.code);
						    	  console.log("Video capture error: ", error.code);
				      });
What is the expected result?

I expect thi sinvocation to start the selected camera. Instead the "error" fall back reports an error (error.code=undefined)

What happens instead?
Instead the "error" fall back reports an error (error.code=undefined)
This "error" is not documented anywhere, nor can I find any explanation for it

Please provide any additional information below. Attach a screenshot if
possible.

If NO camera is selected the cameras start fine after selection by the user
In this case the constaints object is: {video: true,audio: false}

On an EARLIER version of Google Chrome (39/ Android 5) the code that fails (step 4) works pefectly fine

if instead of 192.168.1.12 (or any IP Address) the URL is localhost:8080/wPda step 4 works perfectly fine on Chrome 44 

This has been puzzling me for weeks now, and I  have not made any progress. ANy help is welcome.

Regards to those who will read this post

Christophe