ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Working with video
Extend the NetStream class and make it dynamic
Flash Player 9 and later, Adobe AIR 1.0 and later
You can extend the NetStream class and make the subclass dynamic so that onCuePoint and onMetaData callback
handlers can be added dynamically. This is demonstrated in the following listing:
var ns:DynamicCustomNetStream = new DynamicCustomNetStream();
ns.play("video.flv");
var vid:Video = new Video();
vid.attachNetStream(ns);
addChild(vid);
The DynamicCustomNetStream class is as follows:
package
{
import flash.net.NetConnection;
import flash.net.NetStream;
public dynamic class DynamicCustomNetStream extends NetStream
{
private var nc:NetConnection;
public function DynamicCustomNetStream()
{
nc = new NetConnection();
nc.connect(null);
super(nc);
}
}
}
Even with no handlers for the onMetaData and onCuePoint callback handlers, no errors are thrown since the
DynamicCustomNetStream class is dynamic. If you want to define methods for the onMetaData and onCuePoint
callback handlers, you could use the following code:
var ns:DynamicCustomNetStream = new DynamicCustomNetStream();
ns.onMetaData = metaDataHandler;
ns.onCuePoint = cuePointHandler;
ns.play("http://www.helpexamples.com/flash/video/cuepoints.flv");
var vid:Video = new Video();
vid.attachNetStream(ns);
addChild(vid);
function metaDataHandler(infoObject:Object):void
{
trace("metadata");
}
function cuePointHandler(infoObject:Object):void
{
trace("cue point");
}
Last updated 6/6/2012
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