Apple DVD Studio Pro 4 - Manual (Page 572)

Track Content Group
A set of at least four files is created for each track and slideshow in the project. “VTS_01”
in the following filename examples refers to the first VTS block. Files for the second VTS
block would start with “VTS_02.” You can have up to 99 tracks, stories, and slideshows in
a project.
Note: While stories do not get placed in their own VTS block, they still count against the
99 VTS limit.
Video object files (VOB) contain the actual video, audio, and subtitle content for the menus
and tracks. The maximum size of each VOB file is 1 GB. Within each track content group
there are at least two VOB files—one that is dedicated to menu content and another (up
to eight more) with the track’s contents.
• VTS_01_0.IFO: Contains the major information for the first track, such as the number
and types of streams and menus.
• VTS_01_0.BUP: This is the backup for the .IFO file.
• VTS_01_0.VOB: Contains the video and audio content for the menus. The properties
of the audio and video used in the menus within a VOB must be the same. If your
project has menus using different properties, they are placed in other VTS blocks
(VTS_02_0.VOB, for example). See
VTS Editor for more information on menus and VTS
blocks.
• VTS_01_1.VOB: Contains the video and audio content for the track. If the content is
greater than 1 GB, a second file (VTS_01_2.VOB) is created for that additional content.
Up to seven additional files can be created if required to hold the track’s contents.
Non-Standard SD DVD Video Zone Files
As part of the build process, DVD Studio Pro creates two additional files in the VIDEO_TS
folder. The format process does not include these files in its final output.
• A .layout file: This file uses the disc name and a “.layout” extension. The file contains
project information used by the format process, including the marker information used
when creating dual-layer discs.
• A VOB_DATA.LAY file: This file is used for incremental builds when you choose to reuse
files in the VIDEO_TS folder left from a previous build for a new build.
Note: The .layout filename must match the disc name for an incremental build to work.
See
Incremental Builds for more information.
If you intend to manually copy the VIDEO_TS folder to a disc (bypassing the DVD Studio Pro
format process), you should be sure not to copy the above files to the disc. Most DVD
players ignore them if they are present in the VIDEO_TS folder on the final disc, but some
are unable to play the disc.
572 Chapter 22 Finishing a Project