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You can add cue points to an FLV file in four ways: Add them when you create the FLV file in the Adobe Media Encoder. Add them using the FLVPlayback component s parameters. Add them using the addASCuePoint() method in ActionScript. Add them using an XML document. The first two methods are what we call destructive. Once you add a cue point using those two methods, it can t be removed. This means if your timing is off, the video will need to be reencoded and new cue points added. Here s some self-defense if you go with either of those methods: don t remove the video from the render queue until the video is approved for play. In this circumstance and it works only for cue points added in the Adobe Media Encoder you select the video in the render queue and choose Edit Reset Status. When you return to the Cue Points tab, all the cue points will be there, and they can be removed and changed. The second method is one we showed you earlier in the chapter. You can use the cue points feature of the Properties panel to add them. The downside to this is if changes need to be made you need to have ready access to the original FLA. The last two ways are the most flexible because, if the timing is off, you simply open the code and change a number. Here, we will concentrate on using an XML document to insert the cue points. Before we dig into the XML, you should know that in Flash video, there are three flavors of cue points:

The listNorthStates function is similar to listAllStates except with an added twist. You want only the states that are in the northern region, not all the states. To do this, you first retrieve the north tag using the getElementsByTagName method to retrieve the north element from the XML document. Because the document contains only one north element and because the getElementsByTagName method always returns an array, you use the [0] notation to extract the state element since it s in the first (and only) position in the array returned by the getElementsByTagName method. Now that you have the north element, you can retrieve the state elements that are children of the north element by calling the getElementsByTagName method on the north element. Once you have an array of all the state elements that are children of the north element, you can again use the outputList method to display the states in an alert box.

Navigation cue points: These cue points do exactly what the name implies: they are used to navigate, seek, and trigger ActionScript methods. If you create a navigation cue point, Flash will actually insert a keyframe at that point in the video. Event cue points: These are the most common. They tell Flash and/or ActionScript to do something when they are encountered. ActionScript cue points: These can be used only if you are using the Cue Points area in the Properties panel. They can be used either for navigation or to initiate events while the video plays. In the upcoming exercise, you will create event cue points that will be used to tell Flash to display a caption.

We tend to think the Timed Text format described earlier in this chapter is the way to go for cue points, if only because it s a nonproprietary specification. However, it s good to know your options. You may just decide to use the alternate approach described in this section instead. If you do, there is a very specific format you must follow. Let s look at it. Open the CuePoints.xml document in this chapter s Exercise/YourTurn folder. You can use Dreamweaver CS5, a simple text editor, or even a word processor for this purpose. Just make sure that when you save the file, you save it as plain text. When the document opens, the first chunk of code you will encounter is the following: < xml version="1.0" encoding= UTF-8 standalone="no" > <FLVCoreCuePoints> <CuePoint> <Time>9000</Time> <Type>event</Type> <Name>fl.video.caption.2.0.0</Name> <Parameters> <Parameter> <Name>text</Name> <Value><![CDATA[<font face="Arial, Helvetica, _sans" size="12">Look ... up in the sky ... look...</font>]]></Value> </Parameter> <Parameter> <Name>endTime</Name> <Value>11.0</Value> </Parameter> </Parameters> </CuePoint> </FLVCoreCuePoints>