Teleconferencing app - Video/Audio freeze issues

i have flex based application using flash media server (fms) server (version 4.0)  live video streaming between 2 users (i.e. 1 one teleconferencing service). streaming one-to-one, defined business rules, no third person can join teleconference. either person can start video stream via browser-based flex client , communication gets established once second user joins. validation connecting streams of 2 users implemented on fms server (as server side scripting defined in main.asc).

 

the video frames (and audio) freeze during video conferences. happens when both users have connections (>1.5 mbps , down).

 

 

the following code snippet:

 

var live_mic:microphone = microphone. getenhancedmicrophone();

 

live_mic.useechosuppression;

 

var live_cam:camera = camera.get();

 

live_cam.setmode(320, 240, 30);
live_cam.setquality(32768, 70);
live_cam.setkeyframeinterval(30);

 

 

then start netstreams:

 

var out_ns:netstream;
out_ns = new netstream(nc);
out_ns.attachaudio(live_mic);
out_ns.attachvideo(live_cam);
out_ns.publish("ns_mystream", "live");

 

question: there settings or parameters should adjusted client or server side?

 

thanks ideas...

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