DVD IFO FILE HEADER

Video Manager and Video Title Set IFO file headers

Offset

size

VMG IFO Contents

File Structures

VTS IFO Contents

0000

12

DVDVIDEO-VMG

VMG Files

00000000	Video_ts.ifo
(001C)->
(00C0)->	Video_ts.vob
	Video_ts.bup
(000C)->

VTS Files

Vts_xx_0.ifo	00000000
	<-(001C)
Vts_xx_0.vob	<-(00C0)
Vts_xx_1.vob : Vts_xx_9.vob	<-(00C4)
Vts_xx_0.bup
	<-(000C)

DVDVIDEO-VTS

000C

4

last sector of VMG set (last sector of BUP)

last sector of title set (last sector of BUP)

001C

4

last sector of IFO

last sector of IFO

0020

2

version number

version number

0022

4

VMG category
byte1=prohibited region mask

VTS category   0=unspecified, 1=Karaoke

0026

2

number of volumes

0028

2

volume number

002A

1

side ID

003E

2

number of title sets

0040

32

Provider ID

0060

8

VMG POS

0080

4

end byte address of VMGI_MAT

end byte address of VTS_MAT

0084

4

start address of FP_PGC
(First Play program chain)

00C0

4

start sector of Menu VOB

start sector of Menu Vob

00C4

4

sector pointer to TT_SRPT
(table of titles)

start sector of Title Vob

00C8

4

sector pointer to VMGM_PGCI_UT
(Menu Program Chain table)

sector pointer to VTS_PTT_SRPT
(table of Titles and Chapters)

00CC

4

sector pointer to VMG_PTL_MAIT
(Parental Management masks)

sector pointer to VTS_PGCI
(Title Program Chain table)

00D0

4

sector pointer to VMG_VTS_ATRT
(copies of VTS audio/sub-picture attributes)

sector pointer to VTSM_PGCI_UT
(Menu Program Chain table)

00D4

4

sector pointer to VMG_TXTDT_MG
(text data)

sector pointer to VTS_TMAPTI
(time map)

00D8

4

sector pointer to VMGM_C_ADT
(menu cell address table)

sector pointer to VTSM_C_ADT
(menu cell address table)

00DC

4

sector pointer to VMGM_VOBU_ADMAP
(menu VOBU address map)

sector pointer to VTSM_VOBU_ADMAP
(menu VOBU address map)

00E0

4

sector pointer to VTS_C_ADT
(title set cell address table)

00E4

4

sector pointer to VTS_VOBU_ADMAP
(title set VOBU address map)

0100

2

video attributes of VMGM_VOBS

video attributes of VTSM_VOBS

0102

2

number of audio streams in VMGM_VOBS

number of audio streams in VTSM_VOBS

0104

8*8

audio attributes of VMGM_VOBS

audio attributes of VTSM_VOBS

0144

16

0154

2

number of subpicture streams in VMGM_VOBS (0 or 1)

number of subpicture streams in VTSM_VOBS (0 or 1)

0156

6

subpicture attributes of VMGM_VOBS

subpicture attributes of VTSM_VOBS

015A

164

reserved

reserved

0200

2

video attributes of VTS_VOBS

0202

2

number of audio streams in VTS_VOBS

0204

8*8

audio attributes of VTS_VOBS

0144

16

0254

2

number of subpicture streams in VTS_VOBS

0256

32*6

subpicture attributes of VTS_VOBS

0316

2

0318

8*24

multichannel extension

03D8

Version Number

byte	7	6	5	4	3	2	1	0
0	reserved, should be 0
1	Major version number				Minor version number

Video Attributes

byte	7	6	5	4	3	2	1	0
0	Coding mode 0 = Mpeg-1 1 = Mpeg-2		Standard 0 = NTSC 1 = PAL		Aspect 0 = 4:3 1,2 = reserved 3 = 16:9		Automatic Pan/Scan 1 = disallowed	Automatic Letterbox 1 = disallowed
1	CC for line 21 field 1 in GOP (NTSC only)	CC for line 21 field 2 in GOP (NTSC only)	Resolution NTSC (PAL) 0 = 720x480 (720x576) 1 = 704x480 (704x576) 2 = 352x480 (352x576) 3 = 352x240 (352x288)			0 = Not letterboxed 1 = Letterboxed	Unknown	If Standard = PAL 0 = camera 1 = film

Audio Attributes

byte

7

6

5

4

3

2

1

0

0

Coding mode

0 AC3	1 ???	2 Mpeg-1	3 Mpeg-2ext
4 LPCM	5 ???	6 DTS	7 ???

Multichannel extension present

Language type
0 = unspecified
1 = per bytes 2&3

Application mode
0 = unspecified
1 = karaoke
2 = surround

1

Quantization/DRC
If Coding mode=2,3
0 = No DRC
1 = DRC
If Coding mode=4
0 = 16bps 1 = 20bps 2 = 24bps, (DRC = dynamic range control)

Sample rate
0 = 48Kbps

channels-1

2

1^stcharacter of language code

3

2^ndcharacter of language code

4

reserved for language code extension

5

code extension, 0 = unspecified, 1 = normal, 2 = for visually impaired, 3 = director's comments, 4 = alternate director's comments - see SPRM #17

6

7

Application information
karaoke mode

0

Channel assignments
0 = 1+1 (not valid), 1 = 1/0 (not valid),
2 = 2/0 L,R , 3 = 3/0 L,M,R ,
4 = 2/1 L,R,V1 , 5 = 3/1 L,M,R,V1 ,
6 = 2/2 L,R,V1,V2 , 7 = 3/2 L,M,R,V1,V2

Karaoke version

MC intro present

0=solo, 1=duet

surround mode

reserved

1 = suitable for Dolby surround decoding

reserved

MultiChannel Extension - Karaoke mode

byte (hex)	7	6	5	4	3	2	1	0
00	reserved							ACH0 Guide Melody exists
01	reserved							ACH1 Guide Melody exists
02	reserved				ACH2 Guide Vocal 1 exists	ACH2 Guide Vocal 2 exists	ACH2 Guide Melody 1 exists	ACH2 Guide Melody 2 exists
03	reserved				ACH3 Guide Vocal 1 exists	ACH3 Guide Vocal 2 exists	ACH3 Guide Melody A exists	ACH3 Sound Effect A exists
04	reserved				ACH4 Guide Vocal 1 exists	ACH4 Guide Vocal 2 exists	ACH4 Guide Melody B exists	ACH4 Sound Effect B exists
05-17

Subpicture Attributes

byte	7	6	5	4	3	2	1	0
0	Coding mode 0 = 2-bit rle						Language type 0 = unspecified 1 = per bytes 2&3
1
2	1stcharacter of language code
3	2ndcharacter of language code
4	reserved for language code extension
5	code extension - see SPRM #19

VMGM_C_ADT
VTSM_C_ADT
VTS_C_ADT

This table contains pointers to all the cells in the menu or title set.

offset	0	1	2	3	4	5	6	7
0	number of VOB IDs		reserved		end address (last byte of last entry)
8...	12-byte entries

each entry

Offset	size	Contents
0	2	VOBidn
2	1	CELLidn
3	1
4	4	starting sector within VOB
8	4	ending sector within VOB

VMGM_VOBU_ADMAP
VTSM_VOBU_ADMAP
VTS_VOBU_ADMAP

This table contains pointers to all the VOBUs in the menu or title set.

offset	0	1	2	3
0	end address (last byte of last entry)
4	starting sector within VOB of first VOBU
8 ...	possible additional entries