User Guide

Authoring in the Scenario Editor 165

PGCs

Program chains (PGCs) contain the playback characteristics and navigation information for

the disc’s content, determining the order in which tracks are played and how menus are

linked to other menus and tracks. A PGC is required for each menu, video, and still track in

the scenario. All PGCs within the VMG or a VTS must conform to the parameters speciﬁed

for that VMG or VTS, such as the video format (NTSC or PAL), type of encoding, and bit rate.

PGCs for video and still tracks are often referred to as title PGCs, or titles. PGCs for menu

tracks are often referred to as menu PGCs, or menus.

Table 6: PGC icons

Icon Description

PGC

• Contains Pre and Post commands

• Pre and Post ﬂags can be dragged and linked to titles, other PGCs, and

cells, and turn yellow when they contain commands

• Menu ID ﬂag in upper left indicates whether the PGC is a Title Entry, Title

Menu, Root Menu, Subpicture Menu, Audio Menu, Angle Menu, PTT

Menu, or No Menu

Program

• Contains chapter stop information for each cell in the PGC

• PTT ﬂag indicates the chapter number for the cell it contains

Cell

• Contains video and audio material and Cell commands

• Cell ﬂag can be dragged and linked to other titles, PGCs, and other cells,

and turns yellow when it contains commands

• SM or NSM ﬂag indicates whether the cell will play seamlessly or non-

seamlessly

• Contains subpicture and button highlight information

• Btns ﬂag can be dragged and linked to titles, PGCs, and cells, and turns

yellow when it contains links