Apple DVD Studio Pro 4 - Manual (Page 592)

About VTS Blocks
The contents of a video DVD are contained in one or more VTS blocks. In DVD Studio Pro,
each track and slideshow must reside in its own VTS. Additionally, each VTS has a structure
to support one or more menus and one or more scripts. Also, all DVDs have a video
manager that knows the VTS structure of the disc.
Video Title Set (VTS) blocks
(up to VTS_99)
VTS_01 VTS_02 VTS_03
Main content space
(8 GB maximum)
Menu space
(1 GB maximum)
Script space
VTS block detail
Video manager
Menus and VTS Blocks
All menus in a VTS must use the same video and audio settings, including formats, aspect
ratios, resolutions, and in the case of audio, sample size. For example, if you have some
menus using AIFF audio and others using AC-3, they must be placed in different VTS
blocks. DVD Studio Pro automatically places menus into VTS blocks as needed by their
assets.
Each VTS in an SD project is limited to a single file to hold the menu content, with a
maximum file size of 1 GB. If you have a lot of motion menus, you may exceed this limit
and need to split the menus between multiple VTS blocks.
Note: A single VTS in an HD project can contain up to 99 1 GB files for menus.
DVD Playback and VTS Blocks
When you play a DVD and a jump must occur, such as when a menu button is selected
that jumps to a track’s chapter marker, there is a slight pause while the DVD player’s laser
locates where to jump to on the disc.
• If the track is in a different VTS block than the menu: The laser must first jump to the video
manager files, and from there on to the track’s VTS.
• If the track is in the same VTS block as the menu: The laser is able to go directly to the
track.
592 Chapter 23 Using Advanced Features