OMAR FALEH

This post is to highlight the double buffering technique (also known as dynamic buffering) that “should” make video streaming in flash alot smoother without having to prebuffer anything.

This technique works on progressive video download as well as streaming:

var startBufferLength:Number= 2; //keep this in the range 2-4+
var xpandedBufferLength:Number = 15;  //arbitrarily highnc = new NetConnection();
nc.connect(null);
ns = new NetStream(nc);
ns.setBufferTime(3);
ns.autoPlay = false;
ns.onStatus = Delegate.create(this, handleVideoStatus);//(if this was AS3 the syntax will be:
//ns.addEventListener(NetStatusEvent.NET_STATUS, handleVideoStatus);

// if this was Actionscript 3, this following line would be:
// private function handleStatus(event:NetStatusEvent):void 

function handleVideoStatus(infoObject:Object)
{

	switch (infoObject.code) {
		case "NetConnection.Connect.Success":

		break;

		case "NetStream.Buffer.Full":
			ns.bufferTime = xpandedBufferLength;
		break;

		case "NetStream.Buffer.Empty":
			ns.bufferTime = startBufferLength;
		break;

		case "NetStream.Play.Start":
			// the video has started playing, do something here
		break;

		case "NetStream.Play.Stop" :
			// the video has stopped playing (finished)
		break;

	}
}

This entry was posted on Wednesday, May 28th, 2008 at 12:36 pm and is filed under Actionscript 2.0, Actionscript 3.0, Code Snippets. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.