QuickTime Kit Programming Guide - filibeto.org

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C H A P T E R 3 Extending the QTKitPlayer Application CFBundleVersion 1.0 NSMainNibFile MainMenu NSPrincipalClass NSApplication Running and Building Your QTKitPlayer If you’ve followed correctly all the steps described in this chapter, you’ll be ready to build and run the QTKitPlayer application. In Xcode, simply click the hammer icon with the play button on top, or press Command-R, as you would if you were compiling any other Xcode project. The QTKitPlayer appears with the blue default movie displayed. Now you can open and import other media, export them to different formats, edit the contents of that media, and control movie playback and display, such as showing or not showing the movie controller. You’ll also be able to perform a variety of movie-editing operations discussed earlier in this chapter, such as trimming (shown in Figure 3-22). Figure 3-22 The Apple 1984-2004 QuickTime movie with the editing trim feature enabled Again, the Add command lets you add a new chunk to a movie in one or more new tracks––on top of what’s already there––instead of inserting it like you would do using the Paste command. The Add Scaled command scales the chunk you are pasting in time, and the chunk becomes stretched or compressed so that it plays for the same duration as the current selection in the receiving movie, which can result in a slow-motion or fast-motion effects. The Trim command deletes everything in the current movie except the current selection If you want to export your movie to another media format, such as MPEG-4, choose the Export command in the Edit menu, as shown in Figure 3-23, and the export sheet (Figure 3-24) will appear. 58 Running and Building Your QTKitPlayer 2005-11-09 | © 2004, 2005 Apple Computer, Inc. All Rights Reserved.
C H A P T E R 3 Extending the QTKitPlayer Application Figure 3-23 Exporting the Apple 1984-2004 QuickTime movie in your QTKitPlayer application Figure 3-24 The export sheet for exporting a QuickTime movie to MPEG-4 What’s Ahead? By working through the example code in this chapter and building the extended QTKitPlayer project, you’ve laid the foundation for an even more powerful and robust media player application to come. In the next chapters of this tutorial, you’ll move into a more advanced learning phase. You’ll add new features and capabilities to your QTKitPlayer, such as the ability to open QuickTime streaming movies from URLs. You’ll also learn how to implement a Cocoa drawer with a timer that updates synchronously in real time the rate at which a QuickTime movie is displayed. In later chapters, you’ll extend the QTKitPlayer to handle more robust play back of multimedia content, with up to six movies, video streams, and QuickTime virtual reality movies playing at the same time. Each chapter is intended to demonstrate, step by step, how you can enhance your QTKitPlayer application—and in the process, learn how to tap into the awesome power of Apple’s QTKit framework. What’s Ahead? 59 2005-11-09 | © 2004, 2005 Apple Computer, Inc. All Rights Reserved.
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Contents Introduction Introduction
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Figures and Tables Chapter 1 The Qu
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