Creating Subpictures Outside Adobe Encore Dvd - Adobe ENCORE 2 Manual

Creating subpictures outside Adobe Encore DVD

Button subpicture requirements
A DVD player uses subpictures to highlight buttons. The subpicture is like a transparent overlay that sits on top of
the menu. Subpictures can be difficult to understand, especially if you are accustomed to creating rollovers for web
pages. Although on the surface subpictures and web-page rollovers appear alike—they both indicate button status—
the DVD requirements make subpictures very different.
The first three concepts you need to understand are as follows:
•
The DVD player uses the same overlay for all three button states. (Even the normal state uses the same subpicture.)
•
The color set, not the colors in your original image, ultimately control the colors displayed in the subpicture.
(Technically, the subpicture overlay is a two-bit indexed image.)
•
The subpicture is limited to three colors (each represented by a layer in the button set), but you can change those
three colors and their visibility for each state in the color set. (DVD regulations allow only a limited bandwidth
for button subpictures and subtitles.)
Think of the subpicture as a paint-by-number image, with areas designated for colors 1, 2, or 3. The color set is the
color key that determines what colors (if any) are used for colors 1, 2, and 3. In addition, all three colors can have
different definitions and opacity settings in each button state. By varying the color definitions for each state, you can
change the colors of each area; by varying the opacity of the colors in each state, you control whether or not that area
is even visible in a particular state.
You build the image used for the subpicture by creating separate layers for each color. The layer names must include
the following prefixes: (=1) for areas using color 1, (=2) for areas using color 2, and (=3) for areas using color 3.
(=1)
(=2)
(=3)
A
Relationship between subpicture layers in button set and color set definitions
A. Separate layers for each color (1, 2, and 3) B. All three layers combine to create overlay C. Colors and opacity specified in color set. D. Same
overlay used, but highlight definitions change in each state: Normal (top), Selected (middle), Activated (bottom)
Guidelines for creating subpictures
Keep in mind the following guidelines as you create the subpicture layers:
Same overlay used for all states
and activated).
B
The same image or overlay is used for all three states of a button (normal, selected,
C D
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User Guide