title: Getting "ScreenCaptureError" in Chrome using Kurento Media Server
body: <p>I'm trying to share my screen with Kurento WebRtc server. But getting this error: </p>
  
  <pre><code>NavigatorUserMediaError {name: "ScreenCaptureError", message: "", constraintName: ""}
  </code></pre>
  
  <p>There is no errors in Firefox with same code.
  Constraints using for webrtc:</p>
  
  <pre><code>    var constraints = {
          audio: true,
          video: {
              mandatory : {
                  chromeMediaSource: 'screen',
                  maxWidth: 1920,
                  maxHeight: 1080,
                  maxFrameRate: 30,
                  minFrameRate: 15,
                  minAspectRatio: 1.6
              },
              optional: []
          }
      }
  
      var options = {
             localVideo : video,
             onicecandidate : onIceCandidate,
             mediaConstraints : constraints
      }
      webRtcPeer = new kurentoUtils.WebRtcPeer.WebRtcPeerSendonly(options,function(error) {
         if (error) {
             return console.error(error);
         }
         webRtcPeer.generateOffer(onOfferPresenter);
      });
  </code></pre>
  
  <p>How do I share my screen using chrome and kurento?</p>