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How to Reveal Graphic Image Flaws and Limitations
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Graphical elements in DVD Images are subject to interlacing issues when displayed on video monitors For this reason, the best approach in creating your DVD Image graphics is to view them on a video monitor while you are creating them When possible, mirror your desktop to NTSC video to preview while composing! Several options exist for this: Software display using FireWire to output to video: Echo Fire from Synthetic-Aperture, Inc http://wwwsynthetic-apcom/ Hardware display using a video capture card: Aurora Igniter http://wwwauroravideosyscom/
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I m not high, it s true you can use a simple $19 DVI-to-Video adapter from Apple, part number M9267G/A to convert the second monitor output from a G5 to an NTSC signal the adapter does both Composite and s-Video If you remember to set the resolution properly, you will get a pretty decent output to video, good enough to check your colors and composition! Hardware display using Mac Video card and Apple adapter: http://wwwapplecom/store/ search on M9267G
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Figure 15-15 The $20 video output solution for G5s
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The advantage of displaying your Image in real-time is that you can immediately see when graphical elements are not working properly Graphical elements
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like fonts, lines, and shapes are all affected by the action of interlaced video scanning, and will not display the same on a video monitor as they will on a computer s VGA display The colors are also quite different, as we discussed above, and by mirroring to an external monitor, you can immediately see the final composition of your DVD Image
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When designing DVD Images, it s good to remember that DVDs are many times watched from across the room on a television set or video monitor, rather than being watched from up close on a Computer screen While it may be easy to see a small font up close, it is difficult to see small font information when the DVD is being viewed from a distance For this reason, choice of font size is important, and choice of font face and style will contribute to good readability, and again, lack of jitter As a general rule, use Sans Serif Fonts (like Arial, Helvetica, and similar) instead of complex, fancy or Serif fonts (like Times, New York, or any script font) (See Figs 15-17 and 15-18)
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To avoid interlacing jitter, limit line width to 3 or more pixels This also means when creating shapes, limit the width of border elements (box outlines, circles, ovals, etc) to 3 or more pixels This will prevent jittering of graphic elements once converted to MPEG, and displayed on a video monitor When creating Subpicture Overlays for Menu highlights, pay special attention to the shapes you choose Unlike the background pictures, Menu Highlights are not converted to MPEG, and are not displayed in an anti-aliased manner Try to avoid using circles, ovals, and other rounded shapes, as the sharp edges of the non-anti-aliased pixels will look bad in the finished DVD menu (see Figs 15-16a and 15-16b)
Figure 15-17 Sans Serif font faces don t have tiny points
Figure 15-18 Serif Font faces are not the best choice for DVD Figure 15-16a Anti-Aliased images have smooth sides
Using Layer Styles (Layer Effects) with DVD Studio Pro
One popular method of adding production value to DVD Studio Pro menus is to use Photoshop s Layer
Figure 15-16b Non-Anti-Aliased images have jagged sides
Graphics Issues for DVD Images
Styles (called layer effects in Photoshop 5 and under) The Layer effects/styles add drop shadowing, texturing, beveling, embossing, and a wide variety of other graphics assists to ordinary Photoshop layers, which can take simple text and move it from humdrum to quite striking, as shown in Figure 15-19
Rendering Layer Styles for Layered DVD Menus
While the extra image impact provided by layer styles is striking, a small problem exists when using these effects with a menu destined for DVD Studio Pro While Photoshop can display these layer effects in their natural state, DVD Studio Pro cannot A step called rendering must first be executed, as shown in the steps below Rendering will consolidate the Pixels of the Type or Art and any Layer Styles on to that layer into a single whole image, that can be visible in DVD Studio Pro
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