Video Chat on Android very slow !

Question

Hi everyone,
I'm developing an audio/video chat Android application. On my Android device (Samsung Galaxy S), all works... but it is very very slow !!
I launch the application (release version) on my phone and then I launch this application from my computer (from Flash Builder)
Each applications are connected to the Cirrus server and streams are sent/received. On my computer, no problem. But on my phone, the CPU usage grows immediatly (>90 % !) and the app finish to crash.
Before I click on the "connect" button : RAM 26 mb / CPU 0.33% (great !)
When I publish my audio/video via NetStream : RAM 42 mb / CPU 64%
When I publish AND receive an audio/video NetStream : RAM 48 mb / CPU 94%
By the way, my phone is getting hot...
I know that this could be done without such performance problems on Android. The proof : http://coenraets.org/blog/2010/07/video-chat-for-android-in-30-lines-of-code/
Yes, LCCS is use here by C. Coenraets, but LCCS is nothing but a NetConnection/NetStream and a RTMFP solution... So what am i doing wrong ? Any help would be very appreciated.
I paste here the code (firstView of the ViewNavigatorApplication) :
<?xml version="1.0" encoding="utf-8"?>
<s:View xmlns:fx="http://ns.adobe.com/mxml/2009"
                    xmlns:s="library://ns.adobe.com/flex/spark" title="HomeView" xmlns:mx="library://ns.adobe.com/flex/mx" actionBarVisible="false">
          <fx:Script>
                    <![CDATA[
                               * Tezqa | [email protected] | www.tezqa.com
                              private var SERVER:String = "rtmfp://p2p.rtmfp.net/";
                              private var KEY:String = "CIRRUS DEVELOPER KEY";
                              private var netConnection:NetConnection;
                              private var netStreamPublisher:NetStream;
                              private var netStreamSubscriber:NetStream;
                              private var groupSpecifier:GroupSpecifier;
                              private var camera:Camera;
                              private var microphone:Microphone;
                              private var videoPublisher:Video;
                              private var videoSubscriber:Video;
                              private var username:String;
                              private var budyname:String;
                              [Bindable] private var connected:Boolean = false;
                              private function startStop():void {
                                        if (connected) {
                                                  disconnect();
                                        } else {
                                                  username = usernameInput.text;
                                                  budyname = budynameInput.text;
                                                  connect();
                              private function connect():void {
                                        netConnection = new NetConnection();
                                        netConnection.addEventListener(NetStatusEvent.NET_STATUS, netStatus);
                                        netConnection.connect (SERVER, KEY);
                              private function onConnect():void {
                                        connected = true;
                                        groupSpecifier = new GroupSpecifier ("com.tezqa.mobilecam");
                                        groupSpecifier.multicastEnabled = true;
                                        groupSpecifier.postingEnabled = true;
                                        groupSpecifier.serverChannelEnabled = true;
                                        netStreamPublisher = new NetStream (netConnection, groupSpecifier.groupspecWithAuthorizations());
                                        netStreamPublisher.addEventListener (NetStatusEvent.NET_STATUS, netStatus);
                                        attachCamera();
                                        attachMicrophone();
                                        netStreamPublisher.publish ("stream_" + username, "live");
                                        videoPublisher = new Video(uic1.width, uic1.height);
                                        videoPublisher.attachCamera(camera);
                                        uic1.addChild(videoPublisher);
                                        netStreamSubscriber = new NetStream (netConnection, groupSpecifier.groupspecWithAuthorizations());
                                        netStreamSubscriber.addEventListener (NetStatusEvent.NET_STATUS, netStatus);
                                        netStreamSubscriber.play ("stream_" + budyname);
                                        videoSubscriber = new Video(uic2.width, uic2.height);
                                        videoSubscriber.attachNetStream(netStreamSubscriber);
                                        uic2.addChild(videoSubscriber);
                              public function attachMicrophone():void {
                                        microphone = null;
                                        netStreamPublisher.attachAudio (null);
                                        microphone = Microphone.getEnhancedMicrophone();
                                        if (!microphone) microphone = Microphone.getMicrophone();
                                        if (microphone) {
                                                  microphone.codec = SoundCodec.SPEEX;
                                                  microphone.framesPerPacket = 1;
                                                  microphone.setSilenceLevel(0, 3000);
                                                  microphone.gain = 100;
                                                  microphone.rate = 22;
                                                  netStreamPublisher.attachAudio (microphone);
                              public function detachMicrophone():void {
                                        netStreamPublisher.attachAudio (null);
                                        microphone = null;
                              public function attachCamera(cameraPosition:String = "auto"):Camera {
                                        camera = null;
                                        netStreamPublisher.attachCamera(null);
                                        if (cameraPosition == "auto") {
                                                  camera = Camera.getCamera();
                                        } else {
                                                  if (Camera.names.length == 1) {
                                                            camera = Camera.getCamera();
                                                  } else {
                                                            var tmpCamera:Camera = null;
                                                            for (var i:uint = 0; i < Camera.names.length; i++) {
                                                                      tmpCamera = Camera.getCamera(Camera.names[i]);
                                                                      if (tmpCamera.position == cameraPosition) {
                                                                                camera = tmpCamera;
                                                                                break;
                                        if (camera) {
                                                  camera.setMode (640, 480, 15, true);
                                                  camera.setQuality (15000, 0); // 30000, 0 (adobe settings)
                                                  netStreamPublisher.attachCamera (camera);
                                                  return camera;
                                        } else {
                                                  return null;
                              public function detachCamera():void {
                                        netStreamPublisher.attachCamera (null);
                                        camera = null;
                              private function disconnect():void {
                                        detachCamera();
                                        detachMicrophone();
                                        netStreamPublisher.close();
                                        netStreamSubscriber.close();
                                        netStreamPublisher.removeEventListener(NetStatusEvent.NET_STATUS, netStatus);
                                        netStreamSubscriber.removeEventListener(NetStatusEvent.NET_STATUS, netStatus);
                                        netConnection.removeEventListener(NetStatusEvent.NET_STATUS, netStatus);
                                        netStreamPublisher = null;
                                        netStreamSubscriber = null;
                                        netConnection = null;
                                        videoPublisher.clear();
                                        videoPublisher.attachCamera(null);
                                        videoSubscriber.clear();
                                        uic1.removeChild(videoPublisher);
                                        uic2.removeChild(videoSubscriber);
                                        videoPublisher = null;
                                        videoSubscriber = null;
                                        connected = false;
                              private function netStatus(e:NetStatusEvent):void {
                                        switch(e.info.code) {
                                                  case "NetConnection.Connect.Success":
                                                            onConnect();
                                                            break;
                                                  default:
                                                            break;
                    ]]>
          </fx:Script>
          <s:VGroup width="100%" height="100%">
                    <s:HGroup width="100%" height="100%">
                              <mx:UIComponent id="uic1" width="50%" height="100%"/>
                              <mx:UIComponent id="uic2" width="50%" height="100%"/>
                    </s:HGroup>
                    <s:Label text="Connected : {connected}" paddingLeft="10"/>
                    <s:HGroup width="100%" horizontalAlign="center" verticalAlign="middle" paddingBottom="10">
                              <s:TextInput id="usernameInput" prompt="Enter your name" text="lug" width="35%"/>
                              <s:TextInput id="budynameInput" prompt="Enter budy name" text="kat" width="35%"/>
                              <s:Button label="{connected?'Disconnect':'Connect'}" click="startStop()"/>
                    </s:HGroup>
          </s:VGroup>
</s:View>

Answer 1

Ok my microphone and camera settings were bad.
I comment out these lines :
                                                  microphone.codec = SoundCodec.SPEEX;
                                                  microphone.framesPerPacket = 1;
                                                  microphone.setSilenceLevel(0, 3000);
                                                  microphone.gain = 100;
                                                  microphone.rate = 22;
//camera.setMode (640, 480, 15, true);
                                                  //camera.setQuality (15000, 0); // 30000, 0 (adobe settings)
Then the application works better, but still use CPU at 80-90% after a while... And finish to crash. Any idea ?