| Most of these items are mentioned in various other places in this chapter, but it may be helpful to summarize them here, in one place. iDVD can use any format that QuickTime recognizes, such as JPEG, PICT, PNG, TIFF, or Photoshop. Photo sizes of 640 x 480 pixels work well in iDVD. Larger sizes can be used but will be resized by iDVD to 640 x 480. A resolution of 72 ppi is ideal, although you can use higher-resolution images and iDVD will convert them to 72 ppi. Images smaller than 640 x 480 pixels will be enlarged by iDVD, usually adversely affecting the image quality. If you use a large quantity of high-resolution images in a slideshow, you may notice the iDVD application acts sluggish, but the final DVD will be okay. Each slideshow you create can have up to 99 photos. In the Slideshow editor, if you set the "Slide Duration" pop-up menu to "Manual," you cannot include music with the slideshow. MPEG-1 files, QuickTime VR movies, and movies with sprite or Flash tracks cannot be added to an iDVD project. iDVD accepts audio files that are supported by QuickTime, such as AAC, MP3, M4P, AIFF, and WAV. Each iDVD menu is allowed a maximum of twelve buttons. A slideshow in a drop zone can have a maximum of thirty photos. iDVD projects can have a combined total of 99 tracks (movies and slideshows). Of course, that depends on the duration of the content. You're still limited to 4.3 gigabytes of storage space. iDVD projects can contain up to 99 menus. iDVD will recognize up to 99 chapter markers in a movie. NTSC is the video standard for North America and Japan. PAL is the video standard for most of Europe and elsewhere.
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