publish live video/audio stream

//publish stream
var livestream:NetConnection = new NetConnection();
livestream.objectEncoding = ObjectEncoding.AMF0;
livestream.client = this;
livestream.addEventListener( NetStatusEvent.NET_STATUS , netStatus );
livestream.connect("rtmp://domain/oflaDemo");
var hostStream:NetStream = new NetStream(livestream);
          hostStream.attachCamera(cam);
hostStream.publish("lecture", "live"); 
 
       function netStatus (event:NetStatusEvent):void
        {
 
            trace( event.info.code );
 
            if ( event.info.code == "NetConnection.Connect.Rejected" )
            {
 
                trace( event.info.application );
 
            }
			
			 if ( event.info.code == "NetConnection.Connect.Rejected" )
            {
 
                trace( event.info.application );
 
            }
    }