MACROMEDIA FLASH MX 2004-ACTIONSCRIPT LANGUAGE Reference page 636

Example
The following example displays data about the stream in the Output panel:
var connection_nc:NetConnection = new NetConnection();
connection_nc.connect(null);
var stream_ns:NetStream = new NetStream(connection_nc);
my_video.attachVideo(stream_ns);
stream_ns.play("video1.flv");
stream_ns.onStatus = function(infoObject:Object) {
trace("NetStream.onStatus called: ("+getTimer()+" ms)");
for (var prop in infoObject) {
trace("\t"+prop+":\t"+infoObject[prop]);
}
trace("");
};
See also
System.onStatus,
636 Chapter 2: ActionScript Language Reference
NetStream.setBufferTime()