[chamele0n]

.........
var loader:Loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onLoaderComplete);
 
function onComplete(event:Event):void {
	loader.loadBytes(fileRefList.data);
}
 
function onLoaderComplete(event:Event):void {
	var smallBitmap:BitmapData = convertToSmallBitmap(loader.content as Bitmap);
           .....
	request.data = smallBitmap.getPixels(smallBitmap.rect);
           .....
}