diff --git a/trunk/research/players/js/srs.log.js b/trunk/research/players/js/srs.log.js
old mode 100644
new mode 100755
index c3ffde5f5..eb7d27d3b
--- a/trunk/research/players/js/srs.log.js
+++ b/trunk/research/players/js/srs.log.js
@@ -7,18 +7,31 @@
         <span id="txt_log_msg">日志内容</span>
     </div>
 */
+var srs_log_disabled = false;
 function info(desc) {
+    if (srs_log_disabled) {
+        return;
+    }
+    
     $("#txt_log").addClass("alert-info").removeClass("alert-error").removeClass("alert-warn");
     $("#txt_log_title").text("Info:");
-    $("#txt_log_msg").text(desc);
+    $("#txt_log_msg").html(desc);
 }
 function warn(code, desc) {
+    if (srs_log_disabled) {
+        return;
+    }
+    
     $("#txt_log").removeClass("alert-info").removeClass("alert-error").addClass("alert-warn");
     $("#txt_log_title").text("Warn:");
-    $("#txt_log_msg").text("code: " + code + ", " + desc);
+    $("#txt_log_msg").html("code: " + code + ", " + desc);
 }
 function error(code, desc) {
+    if (srs_log_disabled) {
+        return;
+    }
+    
     $("#txt_log").removeClass("alert-info").addClass("alert-error").removeClass("alert-warn");
     $("#txt_log_title").text("Error:");
-    $("#txt_log_msg").text("code: " + code + ", " + desc);
+    $("#txt_log_msg").html("code: " + code + ", " + desc);
 }
diff --git a/trunk/research/players/js/srs.page.js b/trunk/research/players/js/srs.page.js
index 322286eae..165b8d8b7 100755
--- a/trunk/research/players/js/srs.page.js
+++ b/trunk/research/players/js/srs.page.js
@@ -10,7 +10,7 @@ function srs_get_player_width() { return srs_get_player_modal() - 30; }
 function srs_get_player_height() { return srs_get_player_width() * 9 / 19; }
 
 // to query the swf anti cache.
-function srs_get_version_code() { return "1.13"; }
+function srs_get_version_code() { return "1.15"; }
 // get the default vhost for players.
 function srs_get_player_vhost() { return "players"; }
 // the api server port, for chat room.
@@ -139,6 +139,21 @@ function srs_init_publish(rtmp_url) {
     }
 }
 
+// check whether can republish
+function srs_can_republish() {
+    var browser = get_browser_agents();
+    
+    if (browser.Chrome || browser.Firefox) {
+        return true;
+    }
+    
+    if (browser.MSIE || browser.QQBrowser) {
+        return false;
+    }
+    
+    return false;
+}
+
 // without default values set.
 function srs_initialize_codec_page(
     cameras, microphones,
diff --git a/trunk/research/players/js/srs.publisher.js b/trunk/research/players/js/srs.publisher.js
index 3dac341ec..50363e7d5 100755
--- a/trunk/research/players/js/srs.publisher.js
+++ b/trunk/research/players/js/srs.publisher.js
@@ -54,6 +54,8 @@ SrsPublisher.prototype.start = function() {
     // embed the flash.
     var flashvars = {};
     flashvars.id = this.id;
+    flashvars.width = this.width;
+    flashvars.height = this.height;
     flashvars.on_publisher_ready = "__srs_on_publisher_ready";
     flashvars.on_publisher_error = "__srs_on_publisher_error";
     flashvars.on_publisher_warn = "__srs_on_publisher_warn";
diff --git a/trunk/research/players/js/srs.utility.js b/trunk/research/players/js/srs.utility.js
old mode 100644
new mode 100755
index 19b715859..1f2bb1eeb
--- a/trunk/research/players/js/srs.utility.js
+++ b/trunk/research/players/js/srs.utility.js
@@ -81,3 +81,54 @@ function srs_parse_rtmp_url(rtmp_url) {
     
     return ret;
 }
+
+/**
+* get the agent.
+* @return an object specifies some browser.
+*   for example, get_browser_agents().MSIE
+*/
+function get_browser_agents() {
+    var agent = navigator.userAgent;
+    
+    /**
+    WindowsPC platform, Win7:
+        chrome 31.0.1650.63:
+            Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 
+            (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36
+        firefox 23.0.1:
+            Mozilla/5.0 (Windows NT 6.1; WOW64; rv:23.0) Gecko/20100101 
+            Firefox/23.0
+        safari 5.1.7(7534.57.2):
+            Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.57.2 
+            (KHTML, like Gecko) Version/5.1.7 Safari/534.57.2
+        opera 15.0.1147.153:
+            Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 
+            (KHTML, like Gecko) Chrome/28.0.1500.95 Safari/537.36 
+            OPR/15.0.1147.153
+        360 6.2.1.272: 
+            Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; 
+            Trident/6.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; 
+            .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; .NET4.0C; 
+            .NET4.0E)
+        IE 10.0.9200.16750(update: 10.0.12):
+            Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; 
+            Trident/6.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; 
+            .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; .NET4.0C; 
+            .NET4.0E)
+    */
+    
+    return {
+        // platform
+        Android: agent.indexOf("Android") != -1,
+        Windows: agent.indexOf("Windows") != -1,
+        iPhone: agent.indexOf("iPhone") != -1,
+        // Windows Browsers
+        Chrome: agent.indexOf("Chrome") != -1,
+        Firefox: agent.indexOf("Firefox") != -1,
+        QQBrowser: agent.indexOf("QQBrowser") != -1,
+        MSIE: agent.indexOf("MSIE") != -1, 
+        // Android Browsers
+        Opera: agent.indexOf("Presto") != -1,
+        MQQBrowser: agent.indexOf("MQQBrowser") != -1
+    };
+}
diff --git a/trunk/research/players/srs_chat.html b/trunk/research/players/srs_chat.html
index 09839a09b..804f7efa5 100755
--- a/trunk/research/players/srs_chat.html
+++ b/trunk/research/players/srs_chat.html
@@ -27,18 +27,23 @@
         var previous_chats = [];
         var no_play = false;
         
+        var query = parse_query_string();
         $(function(){
             // get the vhost and port to set the default url.
             // for example: http://192.168.1.213/players/jwplayer6.html?port=1935&vhost=demo
             // url set to: rtmp://demo:1935/live/livestream
             srs_init_publish("#txt_url");
             
+            if (query.agent == "true") {
+                document.write(navigator.userAgent);
+                return;
+            }
+            
             $("#realtime_player_url").tooltip({
                 title: "右键复制RTMP地址"
             });
             
             // if no play specified, donot show the player, for debug the publisher.
-            var query = parse_query_string();
             if (query.no_play == "true") {
                 no_play = true;
             }
@@ -65,6 +70,10 @@
                 );
             };
             srs_publisher.on_publisher_error = function(code, desc) {
+                if (!on_publish_stop()) {
+                    return;
+                }
+                
                 error(code, desc + "请重试。");
             };
             srs_publisher.on_publisher_warn = function(code, desc) {
@@ -107,6 +116,18 @@
             refresh();
         });
         
+        function on_publish_stop() {
+            if (!srs_can_republish()) {
+                $("#btn_join").attr("disabled", true);
+                error(0, "您使用的浏览器很弱，请关闭页面后重新打开页面（刷新也不管用）。<br/>推荐使用Chrome/Firefox/Safari/Opera浏览器，支持重试");
+                
+                srs_log_disabled = true;
+                return false;
+            }
+            
+            return true;
+        }
+        
         function update_play_url() {
             var url = $("#txt_url").val();
             
@@ -432,6 +453,10 @@
                 data       : "",
                 dataType   : "json",
                 complete   : function() {
+                    if (!on_publish_stop()) {
+                        return;
+                    }
+            
                     $("#btn_join").attr("disabled", false);
                     if (complete_pfn) {
                         complete_pfn();
diff --git a/trunk/research/players/srs_publisher.html b/trunk/research/players/srs_publisher.html
index a40382c68..3f90e8983 100755
--- a/trunk/research/players/srs_publisher.html
+++ b/trunk/research/players/srs_publisher.html
@@ -23,12 +23,18 @@
         var remote_player = null;
         var realtime_player = null;
         
+        var query = parse_query_string();
         $(function(){
             // get the vhost and port to set the default url.
             // for example: http://192.168.1.213/players/jwplayer6.html?port=1935&vhost=demo
             // url set to: rtmp://demo:1935/live/livestream
             srs_init("#txt_url", null, null);
             
+            if (query.agent == "true") {
+                document.write(navigator.userAgent);
+                return;
+            }
+            
             $("#btn_video_settings").click(function(){
                 $("#video_modal").modal({show:true});
             });
@@ -65,6 +71,9 @@
                 );
             };
             srs_publisher.on_publisher_error = function(code, desc) {
+                if (!on_publish_stop()) {
+                    return;
+                }
                 error(code, desc + "请重试。");
             };
             srs_publisher.on_publisher_warn = function(code, desc) {
@@ -75,7 +84,6 @@
             update_play_url();
             
             // if no play specified, donot show the player, for debug the publisher.
-            var query = parse_query_string();
             if (query.no_play != "true") {
                 // start the normal player with HLS supported.
                 remote_player = new SrsPlayer("remote_player", 430, 185);
@@ -101,6 +109,18 @@
             }
         });
         
+        function on_publish_stop() {
+            if (!srs_can_republish()) {
+                $("#btn_join").attr("disabled", true);
+                error(0, "您使用的浏览器很弱，请关闭页面后重新打开页面（刷新也不管用）。<br/>推荐使用Chrome/Firefox/Safari/Opera浏览器，支持重试");
+                
+                srs_log_disabled = true;
+                return false;
+            }
+            
+            return true;
+        }
+        
         /**
         * we generate the transcoded stream url for flash publish donot support HLS
         * which requires aac, so the publish vhost maybe players for example, we
@@ -112,7 +132,6 @@
         function update_play_url() {
             var url = $("#txt_url").val();
             var ret = srs_parse_rtmp_url(url);
-            var query = parse_query_string();
             
             var remote_url = "rtmp://" + ret.server + ":" + ret.port + "/" + ret.app + "...vhost..." + srs_get_player_publish_vhost(ret.vhost) + "/" + ret.stream;
             $("#realtime_player_url").attr("href", url).attr("target", "_blank");
@@ -147,6 +166,10 @@
                 //$("#remote_player_url").attr("href", "#").attr("target", "_self");
                 //$("#txt_play_hls").text("HLS-m3u8(请发布视频)").attr("href", "#").attr("target", "_self");
                 //$("#txt_play_jwplayer").text("HLS-JWPlayer(请发布视频)").attr("href", "#").attr("target", "_self");
+                
+                if (!on_publish_stop()) {
+                    return;
+                }
                 return;
             }
             
diff --git a/trunk/research/players/srs_publisher/release/srs_publisher.swf b/trunk/research/players/srs_publisher/release/srs_publisher.swf
index 0c22b9c95..c7c7b5805 100755
Binary files a/trunk/research/players/srs_publisher/release/srs_publisher.swf and b/trunk/research/players/srs_publisher/release/srs_publisher.swf differ
diff --git a/trunk/research/players/srs_publisher/src/srs_publisher.as b/trunk/research/players/srs_publisher/src/srs_publisher.as
index db889437a..d9141b4ce 100755
--- a/trunk/research/players/srs_publisher/src/srs_publisher.as
+++ b/trunk/research/players/srs_publisher/src/srs_publisher.as
@@ -16,6 +16,8 @@ package
     import flash.media.Video;
     import flash.net.NetConnection;
     import flash.net.NetStream;
+    import flash.system.Security;
+    import flash.system.SecurityPanel;
     import flash.ui.ContextMenu;
     import flash.ui.ContextMenuItem;
     import flash.utils.setTimeout;
@@ -84,6 +86,18 @@ package
             this.js_on_publisher_error = flashvars.on_publisher_error;
             this.js_on_publisher_warn = flashvars.on_publisher_warn;
             
+            // initialized size.
+            this.user_w = flashvars.width;
+            this.user_h = flashvars.height;
+            
+            // try to get the camera, if muted, alert the security and requires user to open it.
+            var c:Camera = Camera.getCamera();
+            if (c.muted) {
+                Security.showSettings(SecurityPanel.PRIVACY);
+            }
+            
+            __show_local_camera(c);
+            
             flash.utils.setTimeout(this.system_on_js_ready, 0);
         }
         
@@ -221,17 +235,7 @@ package
                 var streamName:String = url.substr(url.lastIndexOf("/"));
                 media_stream.publish(streamName);
                 
-                media_video = new Video();
-                media_video.width = _width;
-                media_video.height = _height;
-                media_video.attachCamera(media_camera);
-                media_video.smoothing = true;
-                addChild(media_video);
-                
-                //__draw_black_background(_width, _height);
-                
-                // lowest layer, for mask to cover it.
-                setChildIndex(media_video, 0);
+                __show_local_camera(media_camera);
             });
             
             var tcUrl:String = this.user_url.substr(0, this.user_url.lastIndexOf("/"));
@@ -242,11 +246,6 @@ package
          * function for js to call: to stop the stream. ignore if not publish.
          */
         private function js_call_stop():void {
-            if (this.media_video) {
-                this.media_video.attachCamera(null);
-                this.removeChild(this.media_video);
-                this.media_video = null;
-            }
             if (this.media_stream) {
                 this.media_stream.attachAudio(null);
                 this.media_stream.attachCamera(null);
@@ -363,5 +362,52 @@ package
             //		quality=1 is lowest quality, 100 is highest quality.
             c.setQuality(cameraBitrate / 8.0 * 1000, cameraQuality);
         }
+        
+        private function __show_local_camera(c:Camera):void {
+            if (this.media_video) {
+                this.media_video.attachCamera(null);
+                this.removeChild(this.media_video);
+                this.media_video = null;
+            }
+            
+            // show local camera
+            media_video = new Video();
+            media_video.attachCamera(c);
+            media_video.smoothing = true;
+            addChild(media_video);
+            
+            // rescale the local camera.
+            var cw:Number = user_h * c.width / c.height;
+            if (cw > user_w) {
+                var ch:Number = user_w * c.height / c.width;
+                media_video.width = user_w;
+                media_video.height = ch;
+            } else {
+                media_video.width = cw;
+                media_video.height = user_h;
+            }
+            media_video.x = (user_w - media_video.width) / 2;
+            media_video.y = (user_h - media_video.height) / 2;
+            
+            __draw_black_background(user_w, user_h);
+            
+            // lowest layer, for mask to cover it.
+            setChildIndex(media_video, 0);
+        }
+        
+        /**
+         * draw black background and draw the fullscreen mask.
+         */
+        private function __draw_black_background(_width:int, _height:int):void {
+            // draw black bg.
+            this.graphics.beginFill(0x00, 1.0);
+            this.graphics.drawRect(0, 0, _width, _height);
+            this.graphics.endFill();
+            
+            // draw the fs mask.
+            //this.control_fs_mask.graphics.beginFill(0xff0000, 0);
+            //this.control_fs_mask.graphics.drawRect(0, 0, _width, _height);
+            //this.control_fs_mask.graphics.endFill();
+        }
     }
 }
\ No newline at end of file