Æliens

  <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
  xmlns:ae="*" 
  paddingLeft="0" paddingTop="0" paddingBottom="0" paddingRight="0"
  layout="absolute">
  

  <mx:Script>
  <![CDATA[
   import flash.media.Camera;
   
   private var cameraId:String = ""; 
   private var cameraNo:Number = 0; 
   private var camera:Camera; // = Camera.getCamera();
  

   private function incno() : void {
   setid(cameraNo+1);
   }
   private function decno() : void {
   setid(cameraNo-1);
   }
   private function setid(n:Number = 0) : void {
     cameraNo = n;
     if (n > 0) cameraId = "" + (n-1);
     else cameraId = "0";
     cameralabel.text = "" + n;
   }
  

   private function attach(n:Number = 0) : void {
     if (n != 0) setid(n);
     camera = Camera.getCamera(cameraId);
     video.attachCamera(camera);
    }
  

   import flash.display.StageDisplayState;
   import mx.managers.SystemManager;
  
  public function toggle():void {
    try {
    switch (systemManager.stage.displayState) {
     case StageDisplayState.FULL_SCREEN:
       systemManager.stage.displayState =
             StageDisplayState.NORMAL;
       break;
     default: systemManager.stage.displayState =
           StageDisplayState.FULL_SCREEN;
     break;
     }
    } catch (err:SecurityError) {
              // ignore
     }
   }
  
    
   
  ]]>
  </mx:Script>
  
  

  <mx:VideoDisplay id="video" height="100%" width="100%" autoPlay="false"/>
  
  

  <mx:HBox top="5" right="3">
  <mx:Label color="gray" text="+" click="incno();"/>
  <mx:Label color="gray" text="-" click="decno();"/>
  <mx:Label id="cameralabel" color="white" text="@"
      click="attach(0);"/>
  </mx:HBox>
  
  

  <mx:HBox right="20" bottom="10">
  <mx:Button color="gray" borderColor="0" fillAlphas="[0, 0]"
      label="[]" click="toggle();"/>
  </mx:HBox>
  </mx:Application>