Flash CS3 Documentation

Programming ActionScript 3.0 > Working with video > Writing callback methods for onCuePoint and onMetaData > Create a custom class and define methods to handle the callback methods

Create a custom class and define methods to handle the callback methods

The following code sets the NetStream object's client property to a custom class, CustomClient, which defines handlers for the callback methods:

var nc:NetConnection = new NetConnection();
nc.connect(null);

var ns:NetStream = new NetStream(nc);
ns.client = new CustomClient();
ns.play("video.flv");

var vid:Video = new Video();
vid.attachNetStream(ns);
addChild(vid);

The CustomClient class is as follows:

package
{
    public class CustomClient
    {
        public function onMetaData(infoObject:Object):void
        {
            trace("metadata");
        }
    }
}

The CustomClient class defines a handler for the onMetaData callback handler. If a cue point was encountered and the onCuePoint callback handler was called, an asyncError event (AsyncErrorEvent.ASYNC_ERROR) would be dispatched saying "flash.net.NetStream was unable to invoke callback onCuePoint." To prevent this error, you would either need to define an onCuePoint callback method in your CustomClient class, or define an event handler for the asyncError event.

Flash CS3