User Guide

FLVPlayback class 627

Usage

my_FLVPlybk.playheadUpdateInterval

Description

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.

Example

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";