diff --git a/modules/RTC/RTC.js b/modules/RTC/RTC.js
index ae3d09285..244d783b9 100644
--- a/modules/RTC/RTC.js
+++ b/modules/RTC/RTC.js
@@ -123,12 +123,23 @@ var RTC = {
     getPCConstraints: function () {
         return this.rtcUtils.pc_constraints;
     },
+
+    /**
+     * @param {string[]} um required user media types
+     * @param {function} success_callback
+     * @param {Function} failure_callback
+     *
+     * @param {Object} [options] optional parameters
+     * @param {string} options.resolution
+     * @param {number} options.bandwidth
+     * @param {number} options.fps
+     * @param {string} options.desktopStream
+     */
     getUserMediaWithConstraints:function(um, success_callback,
-                                         failure_callback, resolution,
-                                         bandwidth, fps, desktopStream)
-    {
-        return this.rtcUtils.getUserMediaWithConstraints(um, success_callback,
-            failure_callback, resolution, bandwidth, fps, desktopStream);
+                                         failure_callback, options) {
+        return this.rtcUtils.getUserMediaWithConstraints(
+            um, success_callback, failure_callback, options
+        );
     },
     enumerateDevices: function (callback) {
         this.rtcUtils.enumerateDevices(callback);
diff --git a/modules/RTC/RTCUtils.js b/modules/RTC/RTCUtils.js
index 19d8b6ea6..546c98a4c 100644
--- a/modules/RTC/RTCUtils.js
+++ b/modules/RTC/RTCUtils.js
@@ -49,7 +49,7 @@ function setResolutionConstraints(constraints, resolution) {
             constraints.video.mandatory.minHeight;
 }
 
-function getConstraints(um, resolution, bandwidth, fps, desktopStream) {
+function getConstraints(um, options) {
     var constraints = {audio: false, video: false};
 
     if (um.indexOf('video') >= 0) {
@@ -58,7 +58,7 @@ function getConstraints(um, resolution, bandwidth, fps, desktopStream) {
 
         constraints.video.optional.push({ googLeakyBucket: true });
 
-        setResolutionConstraints(constraints, resolution);
+        setResolutionConstraints(constraints, options.resolution);
     }
     if (um.indexOf('audio') >= 0) {
         if (!RTCBrowserType.isFirefox()) {
@@ -114,7 +114,7 @@ function getConstraints(um, resolution, bandwidth, fps, desktopStream) {
         constraints.video = {
             mandatory: {
                 chromeMediaSource: "desktop",
-                chromeMediaSourceId: desktopStream,
+                chromeMediaSourceId: options.desktopStream,
                 googLeakyBucket: true,
                 maxWidth: window.screen.width,
                 maxHeight: window.screen.height,
@@ -124,21 +124,21 @@ function getConstraints(um, resolution, bandwidth, fps, desktopStream) {
         };
     }
 
-    if (bandwidth) {
+    if (options.bandwidth) {
         if (!constraints.video) {
             //same behaviour as true
             constraints.video = {mandatory: {}, optional: []};
         }
-        constraints.video.optional.push({bandwidth: bandwidth});
+        constraints.video.optional.push({bandwidth: options.bandwidth});
     }
-    if (fps) {
+    if (options.fps) {
         // for some cameras it might be necessary to request 30fps
         // so they choose 30fps mjpg over 10fps yuy2
         if (!constraints.video) {
             // same behaviour as true;
             constraints.video = {mandatory: {}, optional: []};
         }
-        constraints.video.mandatory.minFrameRate = fps;
+        constraints.video.mandatory.minFrameRate = options.fps;
     }
 
     // we turn audio for both audio and video tracks, the fake audio & video seems to work
@@ -405,13 +405,22 @@ function RTCUtils(RTCService, onTemasysPluginReady)
 }
 
 
+/**
+ * @param {string[]} um required user media types
+ * @param {function} success_callback
+ * @param {Function} failure_callback
+ *
+ * @param {Object} [options] optional parameters
+ * @param {string} options.resolution
+ * @param {number} options.bandwidth
+ * @param {number} options.fps
+ * @param {string} options.desktopStream
+ */
 RTCUtils.prototype.getUserMediaWithConstraints = function(
-    um, success_callback, failure_callback, resolution,bandwidth, fps,
-    desktopStream) {
-    currentResolution = resolution;
+    um, success_callback, failure_callback, options) {
+    currentResolution = options.resolution;
 
-    var constraints = getConstraints(
-        um, resolution, bandwidth, fps, desktopStream);
+    var constraints = getConstraints(um, options);
 
     console.info("Get media constraints", constraints);
 
@@ -511,8 +520,9 @@ RTCUtils.prototype.obtainAudioAndVideoPermissions =
                     console.error(
                         'failed to obtain video stream - stop', error);
                     self.errorCallback(error);
-                },
-                config.resolution || '360');
+                }, {
+                    resolution: config.resolution || '360'
+                });
         };
         var obtainAudio = function () {
             self.getUserMediaWithConstraints(
@@ -541,8 +551,9 @@ RTCUtils.prototype.obtainAudioAndVideoPermissions =
         },
         function (error) {
             self.errorCallback(error);
-        },
-        config.resolution || '360');
+        }, {
+            resolution: config.resolution || '360'
+        });
     }
 };
 
@@ -571,7 +582,9 @@ RTCUtils.prototype.errorCallback = function (error) {
                 return self.successCallback(stream);
             }, function (error) {
                 return self.errorCallback(error);
-            }, resolution);
+            }, {
+                resolution: resolution
+            });
     }
     else {
         self.getUserMediaWithConstraints(
diff --git a/modules/desktopsharing/ScreenObtainer.js b/modules/desktopsharing/ScreenObtainer.js
index 9b3e1ae3d..8ef3e607b 100644
--- a/modules/desktopsharing/ScreenObtainer.js
+++ b/modules/desktopsharing/ScreenObtainer.js
@@ -245,9 +245,9 @@ function doGetStreamFromExtension(streamCallback, failCallback) {
                     function (stream) {
                         streamCallback(stream);
                     },
-                    failCallback,
-                    null, null, null,
-                    response.streamId);
+                    failCallback, {
+                        desktopStream: response.streamId
+                    });
             } else {
                 failCallback("Extension failed to get the stream");
             }
diff --git a/modules/desktopsharing/desktopsharing.js b/modules/desktopsharing/desktopsharing.js
index 4c91180cd..b2a8adb1b 100644
--- a/modules/desktopsharing/desktopsharing.js
+++ b/modules/desktopsharing/desktopsharing.js
@@ -70,7 +70,7 @@ module.exports = {
     isDesktopSharingEnabled: function () {
         return screenObtainer.isSupported();
     },
-    
+
     init: function () {
         // Called when RTC finishes initialization
         APP.RTC.addListener(RTCEvents.RTC_READY,
@@ -123,9 +123,9 @@ module.exports = {
                     isUsingScreenStream = false;
                     newStreamCreated(stream);
                 },
-                getVideoStreamFailed,
-                config.resolution || '360'
-            );
+                getVideoStreamFailed, {
+                    resolution: config.resolution || '360'
+                });
         }
     },
     /*
@@ -134,4 +134,3 @@ module.exports = {
      */
     eventEmitter: eventEmitter
 };
-