The middle of the Source tab is where you can choose what burns to the DVD. By default, the current Sequence is selectedin other words, the Timeline. You can further specify From Mark In to Mark Out only (Figure 12.28 ).
Here are your other three choices:
MPEG-IPB: This option allows you to select a file on your hard drive that conforms to the MPEG IPB standard.
DVD/CD-Image: This option is looking specifically for an ISO or IMG file created by another program, but one that is suitable for DVD burning.
Path: This isn't actually used for DVD burning; instead, it allows you to specify a directory you want to back up, your media files, for instance. Once selected, these files are burnt to DVD.
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