diff --git a/html5/verto/js/src/jquery.FSRTC.js b/html5/verto/js/src/jquery.FSRTC.js
index a75dacca8f..e746ee61fa 100644
--- a/html5/verto/js/src/jquery.FSRTC.js
+++ b/html5/verto/js/src/jquery.FSRTC.js
@@ -1003,8 +1003,8 @@
 	resI++;
 
 	video = {
-	    width: w,
-	    height: h
+	    width: {exact: w},
+	    height: {exact: h}
 	    //"minWidth": w,
 	    //"minHeight": h,
 	    //"maxWidth": w,
diff --git a/html5/verto/video_demo/js/verto-min.js b/html5/verto/video_demo/js/verto-min.js
index ca36b1f470..3e8647d9ae 100644
--- a/html5/verto/video_demo/js/verto-min.js
+++ b/html5/verto/video_demo/js/verto-min.js
@@ -88,7 +88,7 @@ return[w,h];}
 var resList=[[160,120],[320,180],[320,240],[640,360],[640,480],[1280,720],[1920,1080]];var resI=0;var ttl=0;var checkRes=function(cam,func){if(resI>=resList.length){var res={'validRes':$.FSRTC.validRes,'bestResSupported':$.FSRTC.bestResSupported()};localStorage.setItem("res_"+cam,$.toJSON(res));if(func)return func(res);return;}
 var video={}
 if(cam){video.deviceId={exact:cam};}
-w=resList[resI][0];h=resList[resI][1];resI++;video={width:w,height:h};getUserMedia({constraints:{audio:ttl++==0,video:video},onsuccess:function(e){e.getTracks().forEach(function(track){track.stop();});console.info(w+"x"+h+" supported.");$.FSRTC.validRes.push([w,h]);checkRes(cam,func);},onerror:function(e){console.warn(w+"x"+h+" not supported.");checkRes(cam,func);}});}
+w=resList[resI][0];h=resList[resI][1];resI++;video={width:{exact:w},height:{exact:h}};getUserMedia({constraints:{audio:ttl++==0,video:video},onsuccess:function(e){e.getTracks().forEach(function(track){track.stop();});console.info(w+"x"+h+" supported.");$.FSRTC.validRes.push([w,h]);checkRes(cam,func);},onerror:function(e){console.warn(w+"x"+h+" not supported.");checkRes(cam,func);}});}
 $.FSRTC.getValidRes=function(cam,func){var used=[];var cached=localStorage.getItem("res_"+cam);if(cached){var cache=$.parseJSON(cached);if(cache){$.FSRTC.validRes=cache.validRes;console.log("CACHED RES FOR CAM "+cam,cache);}else{console.error("INVALID CACHE");}
 return func?func(cache):null;}
 $.FSRTC.validRes=[];resI=0;checkRes(cam,func);}