diff --git a/trunk/3rdparty/signaling/main.go b/trunk/3rdparty/signaling/main.go
index 3338c08c8..97daf2d38 100644
--- a/trunk/3rdparty/signaling/main.go
+++ b/trunk/3rdparty/signaling/main.go
@@ -96,7 +96,7 @@ func (v *Room) Remove(p *Participant) {
 	}
 }
 
-func (v *Room) Notify(ctx context.Context, peer *Participant, event string) {
+func (v *Room) Notify(ctx context.Context, peer *Participant, event, param, data string) {
 	var participants []*Participant
 	func() {
 		v.lock.RLock()
@@ -112,12 +112,15 @@ func (v *Room) Notify(ctx context.Context, peer *Participant, event string) {
 		res := struct {
 			Action       string         `json:"action"`
 			Event        string         `json:"event"`
+			Param        string         `json:"param,omitempty"`
+			Data         string         `json:"data,omitempty"`
 			Room         string         `json:"room"`
 			Self         *Participant   `json:"self"`
 			Peer         *Participant   `json:"peer"`
 			Participants []*Participant `json:"participants"`
 		}{
-			"notify", event, v.Name, r, peer, participants,
+			"notify", event, param, data,
+			v.Name, r, peer, participants,
 		}
 
 		b, err := json.Marshal(struct {
@@ -228,7 +231,6 @@ func main() {
 				}
 
 				var res interface{}
-				var p *Participant
 				if action.Message.Action == "join" {
 					obj := struct {
 						Message struct {
@@ -241,7 +243,7 @@ func main() {
 					}
 
 					r, _ := rooms.LoadOrStore(obj.Message.Room, &Room{Name: obj.Message.Room})
-					p = &Participant{Room: r.(*Room), Display: obj.Message.Display, Out: outMessages}
+					p := &Participant{Room: r.(*Room), Display: obj.Message.Display, Out: outMessages}
 					if err := r.(*Room).Add(p); err != nil {
 						return errors.Wrapf(err, "join")
 					}
@@ -258,7 +260,7 @@ func main() {
 						action.Message.Action, obj.Message.Room, p, r.(*Room).Participants,
 					}
 
-					go r.(*Room).Notify(ctx, p, action.Message.Action)
+					go r.(*Room).Notify(ctx, p, action.Message.Action, "", "")
 				} else if action.Message.Action == "publish" {
 					obj := struct {
 						Message struct {
@@ -276,7 +278,24 @@ func main() {
 					// Now, the peer is publishing.
 					p.Publishing = true
 
-					go r.(*Room).Notify(ctx, p, action.Message.Action)
+					go r.(*Room).Notify(ctx, p, action.Message.Action, "", "")
+				} else if action.Message.Action == "control" {
+					obj := struct {
+						Message struct {
+							Room    string `json:"room"`
+							Display string `json:"display"`
+							Call    string `json:"call"`
+							Data    string `json:"data"`
+						} `json:"msg"`
+					}{}
+					if err := json.Unmarshal(m, &obj); err != nil {
+						return errors.Wrapf(err, "Unmarshal %s", m)
+					}
+
+					r, _ := rooms.LoadOrStore(obj.Message.Room, &Room{Name: obj.Message.Room})
+					p := r.(*Room).Get(obj.Message.Display)
+
+					go r.(*Room).Notify(ctx, p, action.Message.Action, obj.Message.Call, obj.Message.Data)
 				} else {
 					return errors.Errorf("Invalid message %s", m)
 				}
diff --git a/trunk/3rdparty/signaling/www/demos/js/srs.sdk.js b/trunk/3rdparty/signaling/www/demos/js/srs.sdk.js
index f872f7daa..03a77ad6d 100644
--- a/trunk/3rdparty/signaling/www/demos/js/srs.sdk.js
+++ b/trunk/3rdparty/signaling/www/demos/js/srs.sdk.js
@@ -57,7 +57,7 @@ function SrsRtcPublisherAsync() {
         self.pc.addTransceiver("video", {direction: "sendonly"});
 
         var stream = await navigator.mediaDevices.getUserMedia(
-            {audio: true, video: {height: {max: 320}}}
+            {audio: true, video: {width: {max: 320}}}
         );
         // @see https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/addStream#Migrating_to_addTrack
         stream.getTracks().forEach(function (track) {
diff --git a/trunk/3rdparty/signaling/www/demos/js/srs.sig.js b/trunk/3rdparty/signaling/www/demos/js/srs.sig.js
index d78490d99..230629449 100644
--- a/trunk/3rdparty/signaling/www/demos/js/srs.sig.js
+++ b/trunk/3rdparty/signaling/www/demos/js/srs.sig.js
@@ -106,6 +106,7 @@ function SrsRtcSignalingParse(location) {
     host = host? host.split('&')[0] : location.hostname;
 
     let room = location.href.split('room=')[1];
+    room = room? room.split('&')[0] : null;
 
     let display = location.href.split('display=')[1];
     display = display? display.split('&')[0] : new Date().getTime().toString(16).substr(3);
diff --git a/trunk/3rdparty/signaling/www/demos/one2one.html b/trunk/3rdparty/signaling/www/demos/one2one.html
index d6ab19f08..f73aca474 100644
--- a/trunk/3rdparty/signaling/www/demos/one2one.html
+++ b/trunk/3rdparty/signaling/www/demos/one2one.html
@@ -45,19 +45,22 @@
     </div>
 
     <div class="row">
-        <div class="span5">
+        <div class="span4">
             <label></label>
-            <video id="rtc_media_publisher" width="320" autoplay muted controls></video>
+            <video id="rtc_media_publisher" width="310" autoplay muted controls></video>
 
             <label></label>
             <span id='self'></span>
         </div>
         <div class="span6">
             <label></label>
-            <video id="rtc_media_player" width="320" autoplay muted controls></video>
+            <video id="rtc_media_player" width="310" autoplay muted controls></video>
 
             <label></label>
             <span id='peer'></span>
+            <a href="javascript:control_refresh_peer()">Refresh</a>
+            <input type="text" id="txt_alert" class="input-medium" value="">
+            <a href="javascript:control_alert_peer()">Alert</a>
         </div>
     </div>
 </div>
@@ -65,6 +68,8 @@
     var sig = null;
     var publisher = null;
     var player = null;
+    var control_refresh_peer = null;
+    var control_alert_peer = null;
     $(function(){
         console.log('?wss=x to specify the websocket schema, ws or wss');
         console.log('?wsh=x to specify the websocket server ip');
@@ -85,13 +90,32 @@
             sig = new SrsRtcSignalingAsync();
             sig.onmessage = function (msg) {
                 console.log('Notify: ', msg);
-                msg.participants.forEach(function (participant) {
-                    if (participant.display === display || !participant.publishing) return;
-                    startPlay(host, room, participant.display);
-                });
+                if (msg.event === 'publish') {
+                    msg.participants.forEach(function (participant) {
+                        if (participant.display === display || !participant.publishing) return;
+                        startPlay(host, room, participant.display);
+                    });
+                } else if (msg.event === 'control') {
+                    if (msg.param === 'refresh') {
+                        setTimeout(function () {
+                            window.location.href = window.location.href;
+                        }, 500);
+                    } else if (msg.param === 'alert') {
+                        alert('From ' + msg.peer.display + ': ' + msg.data);
+                    }
+                }
             };
             await sig.connect(conf.wsSchema, conf.wsHost, room, display);
 
+            control_refresh_peer = async function () {
+                let r1 = await sig.send({action:'control', room:room, display:display, call:'refresh'});
+                console.log('Signaling: control peer to refresh ok', r1);
+            };
+            control_alert_peer = async function () {
+                let r1 = await sig.send({action:'control', room:room, display:display, call:'alert', data:$('#txt_alert').val()});
+                console.log('Signaling: control peer to alert ok', r1);
+            };
+
             let r0 = await sig.send({action:'join', room:room, display:display});
             console.log('Signaling: join ok', r0);
 
diff --git a/trunk/research/players/js/srs.sdk.js b/trunk/research/players/js/srs.sdk.js
index 6bde3fb8f..03a77ad6d 100644
--- a/trunk/research/players/js/srs.sdk.js
+++ b/trunk/research/players/js/srs.sdk.js
@@ -57,7 +57,7 @@ function SrsRtcPublisherAsync() {
         self.pc.addTransceiver("video", {direction: "sendonly"});
 
         var stream = await navigator.mediaDevices.getUserMedia(
-            {audio: true, video: {height: {max: 320}}}
+            {audio: true, video: {width: {max: 320}}}
         );
         // @see https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/addStream#Migrating_to_addTrack
         stream.getTracks().forEach(function (track) {
@@ -69,7 +69,8 @@ function SrsRtcPublisherAsync() {
         var session = await new Promise(function (resolve, reject) {
             // @see https://github.com/rtcdn/rtcdn-draft
             var data = {
-                api: conf.apiUrl, streamurl: conf.streamUrl, clientip: null, sdp: offer.sdp
+                api: conf.apiUrl, tid: conf.tid, streamurl: conf.streamUrl,
+                clientip: null, sdp: offer.sdp
             };
             console.log("Generated offer: ", data);
 
@@ -101,7 +102,7 @@ function SrsRtcPublisherAsync() {
 
     // Close the publisher.
     self.close = function () {
-        self.pc.close();
+        self.pc && self.pc.close();
         self.pc = null;
     };
 
@@ -141,7 +142,10 @@ function SrsRtcPublisherAsync() {
 
             var streamUrl = urlObject.url;
 
-            return {apiUrl: apiUrl, streamUrl: streamUrl, schema: schema, urlObject: urlObject, port: port};
+            return {
+                apiUrl: apiUrl, streamUrl: streamUrl, schema: schema, urlObject: urlObject, port: port,
+                tid: new Date().getTime().toString(16)
+            };
         },
         parse: function (url) {
             // @see: http://stackoverflow.com/questions/10469575/how-to-use-location-object-to-parse-url-without-redirecting-the-page-in-javascri
@@ -289,7 +293,8 @@ function SrsRtcPlayerAsync() {
         var session = await new Promise(function(resolve, reject) {
             // @see https://github.com/rtcdn/rtcdn-draft
             var data = {
-                api: conf.apiUrl, streamurl: conf.streamUrl, clientip: null, sdp: offer.sdp
+                api: conf.apiUrl, tid: conf.tid, streamurl: conf.streamUrl,
+                clientip: null, sdp: offer.sdp
             };
             console.log("Generated offer: ", data);
 
@@ -315,7 +320,7 @@ function SrsRtcPlayerAsync() {
 
     // Close the player.
     self.close = function() {
-        self.pc.close();
+        self.pc && self.pc.close();
         self.pc = null;
     };
 
@@ -354,7 +359,10 @@ function SrsRtcPlayerAsync() {
 
             var streamUrl = urlObject.url;
 
-            return {apiUrl: apiUrl, streamUrl: streamUrl, schema: schema, urlObject: urlObject, port: port};
+            return {
+                apiUrl: apiUrl, streamUrl: streamUrl, schema: schema, urlObject: urlObject, port: port,
+                tid: new Date().getTime().toString(16)
+            };
         },
         parse: function (url) {
             // @see: http://stackoverflow.com/questions/10469575/how-to-use-location-object-to-parse-url-without-redirecting-the-page-in-javascri