A DVD-compliant disc contains files necessary for playback of DVD-Video, and is made up of one Video Manager (VMG) and multiple Video Title Sets (VTS). The VMG is composed of up to three files:

1. VIDEO_TS.IFO consists of control and playback information for the entire DVD. Locations of all Video Title Sets on the disc are stored in this file. The first-play PGC is also stored in this file. VIDEO_TS.IFO is known as VMGI (The Video Manager Information file). This file is required to be present on a DVD-compliant disc.

2. VIDEO_TS.VOB contains the contents required for the title menu. The title menu is usually designed to get access to video titles present on other VTS, and is displayed when the "Title" button on the remote control is pressed. Short video clips without audio such as FBI warnings, copyright messages are usually stored in this file of the VMG. This file is not required and may or may not be present on a DVD-compliant disc.

3. VIDEO_TS.BUP is an identical copy of VIDEO_TS.IFO. If the DVD player cannot read information from the VIDEO_TS.IFO, it will attempt to get the required information from this backup file. This file is required to be present on a DVD-compliant disc.

Section 12 of the Unofficial DVD Specifications 2.2 Acrobat PDF ebook presents in details all required and optional structures in the Video Manager. If you do not have a permanent Internet connection, this ebook can save you a lot of connection time by reading it off-line and it contains more information than presented on the web pages. Each DVD instruction is organized as a bookmark so you can get to the desired page of any of the 36 DVD commands with just a click. A DVD command generator is provided so you can generate 100%-compliant DVD commands from your desktop.

All research efforts have been done for you and summarized in an easy-to-read format. This is the only ebook of its kind so save yourself a lot of time and efforts searching. You cannot get similar high-quality information anywhere else at this price.

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The ebook version offers these immediate benefits:
Having more detailed information than on the web pages.
Understanding DVD terminology and architecture.
Better use of authoring products such as Sonic Scenarist, Adobe Encore, DVD-Lab, IFOEdit, etc.
Detailed knowledge of DVD virtual commands.
DVD VM Command Generator 2.75 with the same engine as seen on this site to generate 100%-compliant DVD commands.
Understand how DVD menus work with navigation commands.
Conversion of DVD color from YCrCb to RGB plus a free copy of DVD-Color 2.16.
30-day email technical support.
Acquire the technical background to write DVD applications and a lot more...