DVD-Video 解谜 - IFO文件 - Program Chains

Program Chain structure

This is the usual order of tables within one PGC.

PGC
	PGC header
	command table
	program map
	cell playback information
	cell position (VOBidn & CELLidn)

PGC header

Offset	Label	size	Contents
0000		2
0002		1	number of programs
0003		1	number of cells
0004		4	playback time, BCD, hh:mm:ss:ff with bits 7&6 of frame (last) byte indicating frame rate 11 = 30 fps, 10 = illegal, 01 = 25 fps, 00 = illegal
0008		4	prohibited user ops
000C	PGC_AST_CTL	8*2	Audio Stream Control, each entry: byte 7 6 5 4 3 2 1 0 0 1 = stream available reserved Stream number (MPEG audio) or Substream number (all others) 1 reserved
001C	PGC_SPST_CTL	32*4	Subpicture Stream Control, each entry: byte 7 6 5 4 3 2 1 0 0 1 = stream available reserved Stream number for 4:3 1 reserved Stream number for wide 2 reserved Stream number for letterbox 3 reserved Stream number for pan&scan
009C		2	next PGCN FP - Not allowed, VMGM & VTSM - must be in the same domain, VTST - must be in the same title.
009E		2	prev PGCN FP, VMGM, & VTSM - Not allowed, VTST - must be in the same title.
00A0		2	goup PGCN FP - Not allowed, VMGM & VTSM - must be in the same domain, VTST - must be in the same title. If this is a menu PGC goup PGCN may be set to 0xFFFF indicating "resume".
00A2		1	PG playback mode, 0=sequential, otherwise bit7 indicates random (0) or shuffle (1), and the program count-1 is in bits6-0 (minimum program count is 2)
00A3		1	PGC still time, 255=infinite

00A4   16*4 Color LookUp Table (CLUT) (0, Y, Cr, Cb) 00E4   2 offset within PGC to commands 00E6   2 offset within PGC to program map 00E8   2 offset within PGC to cell playback information table 00EA   2 offset within PGC to cell position information table