July 17th

Added Code from http://actionscriptexamples.com/2008/02/26/loading-flv-files-in-actionscript-30-using-the-netconnection-and-netstream-classes/ as a new loader in order to facilate video access.

var video:Video = new Video();

addChild(video);

 

var nc:NetConnection = new NetConnection();

nc.connect(null);

 

var ns:NetStream = new NetStream(nc);

ns.client = {};

ns.client.onMetaData = ns_onMetaData;

ns.client.onCuePoint = ns_onCuePoint;

ns.play("640x480.flv");

 

video.attachNetStream(ns);

 

function ns_onMetaData(item:Object):void {

    trace("metaData");

    // Resize video instance.

    video.width = item.width;

    video.height = item.height;

    // Center video instance on Stage.

    video.x = (stage.stageWidth - video.width) / 2;

    video.y = (stage.stageHeight - video.height) / 2;

}

//var snapshot : BitmapData; 

//snapshot = new BitmapData(myVideo.width,myVideo.height);  

//function takeSnapshot()  

//{  

  // snapshot.draw(myVideo);  

//}  

  

//call takeSnapshot every 100ms (0.1s)  

//setInterval(this,"takeSnapshot",100);  

  

var now : BitmapData; 

var before: BitmapData;  

 

now = new BitmapData(video.width,video.height);  

 

function takeSnapshot()  

{  

   now.draw(video);  

// 1. capture 'now' 2. Do something 3. copy now to before   

   before=now.clone();  

}  

var oldC = computeAverageColour(before,10,10,20,20);  

var newC = computeAverageColour(now,10,10,20,20);  

if (oldC != newC) {  

   trace('Activity... in region');  

} 

  

function computeAverageColour(bm:BitmapData, x:int, y:int, w:int, h:int):Number{  

   var totalR:Number = 0; // 32-bit colour is formatted  

   var totalG:Number = 0; // 8 bits 8 bits 8 bits 8 bits  

   var totalB:Number = 0; //    A      R      G       B  

   var count:Number = 0;  

 

   for (var j:Number = y; j < (y + h); j++) {  

     for (var i:Number = x;  i < (x + w); i++) {  

        var col:Number = bm.getPixel(i, j);  

        var red:Number = (col & 0xFF0000) >> 16;  

        var green:Number = (col & 0x00FF00) >> 8;  

        var blue:Number = col & 0x0000FF;  

        totalR += red;  

        totalG += green;  

        totalB += blue;  

        count++;  

     }  

  }  

// Calculate the average of each colour channel  

  var tR:Number = Math.round(totalR/count);  

  var tG:Number = Math.round(totalG/count);  

  var tB:Number = Math.round(totalB/count);  

// Join them together  

  var targetCol:Number = tR <<>

  return  targetCol;  

}