User Guide

FLVPlayback class 625

For several reasons, the playheadTime property might not have the expected value

immediately after calling one of the seek methods or setting

playheadTime to cause seeking.

First, for a progressive download, you can seek only to a keyframe, so a seek takes you to the

time of the first keyframe after the specified time. (When streaming, a seek always goes to the

precise specified time even if the source FLV file doesn’t have a keyframe there.) Second,

seeking is asynchronous, so if you call a seek method or set the

playheadTime property,

playheadTime does not update immediately. To obtain the time after the seek is complete,

listen for the

seek event, which does not fire until the playheadTime property has updated.

Example

The following example catches occurrences of the stateChange event as it occurs while the

FLV file plays and 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.*;

var listenerObject:Object = new Object();

listenerObject.stateChange = function(eventObject:Object):Void {

trace(my_FLVPlybk.state + ": playhead time is: " +

my_FLVPlybk.playheadTime);

};

my_FLVPlybk.addEventListener("stateChange", listenerObject);

my_FLVPlybk.contentPath = "http://www.helpexamples.com/flash/video/

water.flv";