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Chapter 5. Managing Streams > Creating Synchronized Presentations

5.7. Creating Synchronized Presentations

One of the most compelling features of FlashCom-enabled applications is the way Flash content and streaming audio and video can be merged into a seamless and full-featured presentation. With some careful scripting, you can create a presentation that includes optional viewing of closed captions, animated slides, dynamic repositioning of video, and other effects all synchronized to video playback. There are two approaches to synchronizing events, such as displaying closed captions, to stream time.

The first approach is to embed information about events directly in a stream using the NetStream.send( ) method. The advantages of send( ) are that synchronization is as precise as it can be and that it often requires less scripting. The disadvantages are that send( ) must be called on the publishing stream while it is being recorded and, if the user is allowed to seek to different parts of a stream, additional scripting is required to replay or reestablish the events up to the time the user seeks to. In the future, FLV editors may become available that allow postproduction embedding and editing of remote method calls.


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