ActionScript 2.0 Components Language Reference 
ActionScript 2.0 Components Language Reference |
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| FLVPlayback Component > FLVPlayback class > FLVPlayback.playheadUpdateInterval | |||
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Flash Player 8.
Flash Professional 8.
my_FLVPlybk.playheadUpdateInterval
Property; a number that is the amount of time, in milliseconds, between each playheadUpdate event. Setting this property while the FLV file is playing restarts the timer. The default is 250.
Because ActionScript cue points start on playhead updates, lowering the value of the playheadUpdateInterval property can increase the accuracy of ActionScript cue points.
Because the playhead update interval is set by a call to the global setInterval() function, the update cannot fire more frequently than the SWF file frame rate, as with any interval that is set this way. So, as an example, for the default frame rate of 12 frames per second, the lowest effective interval that you can create is approximately 83 milliseconds, or one second (1000 milliseconds) divided by 12.
The following example sets the playheadUpdateInterval property to 3000 and creates a listener that catches occurrences of the playheadUpdate event as it occurs while the FLV file plays. When the event occurs, the event handler shows the elapsed playhead time in the Output panel.
Drag an FLVPlayback component to the Stage, and give it an instance name of my_FLVPlybk. Then add the following code to the Actions panel on Frame 1 of the Timeline:
/**
Requires:
- FLVPlayback component on the Stage with an instance name of my_FLVPlybk
*/
import mx.video.*;
my_FLVPlybk.playheadUpdateInterval = 3000;
var listenerObject:Object = new Object();
listenerObject.playheadUpdate = function(eventObject:Object):Void {
trace("playhead time is: " + eventObject.playheadTime);
};
my_FLVPlybk.addEventListener("playheadUpdate", listenerObject);
my_FLVPlybk.contentPath = "http://www.helpexamples.com/flash/video/water.flv";
FLVPlayback.playheadTime, FLVPlayback.playheadUpdate
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