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The Settings Button > The Settings Button - Pg. 299

succeed when played on slower computers. And yet this many frames per second tricks the eye into perceiving satisfying, smooth motion; most people can sense that they aren't seeing quite the motion quality they'd see on TV, but don't miss the other ffteen frames each second. ·24,25.An actual Hollywood movie plays 24 frames per second, and the European television signal (PAL) plays at 25. These settings, in other words, are provided for situations where you want excellent motion quality, without going all the way to the extreme of 29.97 frames per second of the American TV standard (NTSC). You save a little bit of disk space, while still showing as many frames as people are accustomed to seeing in motion pictures. ·29.97. If you're wondering how this oddball number got into the pop-up menu, you're not alone. As it turns out, every source that refers to television broadcasts as having 30 frames per second (including other chapters in this book) is rounding off the number for convenience. In fact, a true television broadcast plays at 29.97 frames per second. (iMovie can reproduce that rate for you, if it's important to do so. In fact, this is iMovie's top frame rate.) FREQUENTLY ASKED QUESTION The Expert Settings Oddly Shaped Movies I'm doing a project where I need my movie to be perfectly square, not in a 4:3 width-to-height ratio. But every time I try to specify these dimensions in the Expert QuickTime Settings dialog box, I get a distorted, squished iMovie movie. What can I do? What you're really asking is how to crop your movie. Remember that iMovie creates DV movies, which have a 4:3 aspect ratio. If you want any other proportions without squishing the picture, you have to trim off some of the edges, thus cropping it. Unfortunately, neither iMovie nor QuickTime Player Pro (Chapter 14) offers any simple method of cropping the picture. There is software that can do so, however: Cleaner 6 (www., the $500, professional QuickTime-compression software. As shown here, it lets you draw a dotted-line rectangle that indicates how you'd like the picture to be cropped. If you're using iMovie for professional purposes, a program like Cleaner is a worthwhile investment. Think of it as a much more powerful and fexible version of the Expert QuickTime Set- tings dialog box (Figure 12-5). Its sole purpose is to compress movies, using much more effcient and intelligent software than that built into iMovie. And if you have more expertise than cash, the freeware program ffmpegX can crop video, too. You have to do it by typing in coordinates (rather than adjusting a visual cropping frame), but it works. (You can download ffmpegX from the "Missing CD" page at www. chapter12:fromimovietoquicktime 299