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A Crash Course in Video Compression > A Crash Course in Video Compression - Pg. 289

mation that describes each frame. True, the picture deteriorates as a consequence, but the resulting QuickTime movie fle is a tiny fraction of its original size. The following section describes this compression business in much greater detail. The bottom line is that by combining these three techniques, iMovie can turn your 10 GB DV movie into a 3 MB fle that's small enough to email or post on your Web page. The resulting movie won't play as smoothly, fll as much of the screen, or look as good as the original DV footage. But your viewers won't care. They'll be delighted to be able to watch your movie at all, and grateful that the fle didn't take hours to download. (And besides, having already been exposed to QuickTime movies, most know what to expect.) Tip: The later the QuickTime version your Mac contains, the better and faster the movie-exporting process becomes. Mac OS X's Software Update feature is supposed to alert you every time a new version becomes available (if you have it turned on in System Preferences). Understanding QuickTime A Crash Course in Video Compression The following discussion explores some technical underpinnings of QuickTime technology. It may take you a few minutes to complete this behind-the-scenes tour of how a computer stores video. But without understanding the basics, iMovie's