DVD is a flexible medium for creating and sharing interactive presentations, but the possibilities aren't limited to what you can view on a television. Thanks to the nature of the DVD disc, you can also include files on a DVD that people can access using their computers. This feature is known as DVD-ROM.
DVD-ROM is essentially the equivalent of CD-ROM. ROM stands for read-only memory , which means that you can put data on the disc that can be read by a person with the appropriate drive in his computer. The most typical use for CD-ROM is the discs you use to install software on your computer. Software manufacturers haven't completely switched over to DVD-ROM discs yet, but DVD-ROM drives are becoming much more common in computers, so it's just a matter of time before DVD-ROM drives and discs become as popular as CD-ROMs.
With Hollywood DVDs, the typical use of the DVD-ROM possibilities of DVD is WebDVD, which is sometimes referred to as Web-connected DVD . For example, you might have inserted a rented or purchased DVD in your computer and looked at special features of the DVD that are available only when looking at the disc through the computer. This could include things such as the opportunity to look at the screenplay of the movie, or games and other programs that aren't possible to view on a DVD player (see Figure 20.6).
Figure 20.6. Example of DVD-ROM content, from the DVD that comes with the Macworld DVD Studio Pro Bible. The disc features the VIDEO_TS folder that contains the standard encoded video for a DVD player, as well as the DVD-ROM content, a series of folders including tutorial files, a PDF version of the book, and so on.
The great thing about DVD is that you can put your video on the DVD and someone can view it on his DVD player connected to a television, but you can also put data files that he can access on his computer. It could be that you want to include Web links, documentation, pictures, or any other kind of computer file.
For example, when you make your DVD, you start by creating an iMovie. Then, in iDVD, you can also use the slideshow feature to add pictures that can be viewed on the television. But let's say you want to pass a number of digital pictures along as files so that your colleagues can use the pictures on their Web pages. You might ask yourself, "Do I have to burn them on a CD?" With the DVD-ROM feature in iDVD, you can put the pictures right on the disc.
Or, let's say you have a number of stories or a screenplay that you've written in a word processing program such as AppleWorks or Microsoft Word. Now, if you want to, you could include the files on the DVD disc. So, you could make a DVD with the video that can be watched on the television, and if the recipient wants to, she could put the DVD in her computer and look at the original screenplay by opening the file as she would with any other kind of disc she inserts in her computer.
DVD-ROM content isn't anything that you have to doit's just a great thing to have the flexibility to add computer files to your DVD.
Task: Adding Computer Files to a DVD
You can easily add computer files to your DVD using iDVD.
To delete a file from the DVD-ROM Contents list, select it and press Delete.