4.10 What are .IFO, .VOB, and .AOB files? How can I play them?
Description
This article is from the DVD Formats FAQ, by jtfrog@usa.net (Jim Taylor) with numerous contributions by others.
4.10 What are .IFO, .VOB, and .AOB files? How can I play them?
The DVD-Video and DVD-Audio specifications define how audio and video data
are stored in specialized files. The .IFO (and backup .BUP) files contain
menus and other information about the video and audio. The .VOB files (for
DVD-Video) and .AOB files (for DVD-Audio) are MPEG-2 program streams with
additional packets containing navigation and search information.
Since a .VOB file is just a specialized MPEG-2 file, most MPEG-2 decoders
and players can play them. However, any special features such as angles or
branching will cause strange effects. The best way to play a .VOB file is
to use a DVD player application to play the entire volume (or to open the
VIDEO_TS.IFO file), since this will make sure all the DVD-Video features
are used properly.
The DVD Video Recording format will introduce .SOB files <snigger>.
Most .VOB files won't play when copied to your hard drive. See 4.5.
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