Demuxing Problem

[leowong1]

Hi, guys, I am going to fansub a DVD, by adading subtitles to it without changing the original structure of DVD. Here I wanna ask, should I demux by VOB ID for that dvd? Here's the information.

Menu attributes:
Video: MPEG-2 720x480 (NTSC) (NTSC 525/60) (4:3) (not specified perm.display)
SubPicture 1: Not Specified (2-bit rle )

Title Set (Movie) attributes:
Video: MPEG-2 720x480 (NTSC) (NTSC 525/60) (4:3) (not specified perm.display)
Audio 1: Japanese (Dolby AC-3) 2ch 48Kbps DRC normal (ID: 0x80)

PGC_1 (program chain): [Title(TTN): 1] [00:48:15.29 / 30 fps] (Programs: 8) (Cells: 8) (uses VOB-IDs: 1,2)
[Ch 01] [Pg 01] [Cell 01] [V/C Id: 1/ 1] : time: 00:01:55.00 / 30 fps [Pos: 00:01:55.00] [Frames: 3450] SP/ILVU/DISC/SA:[ no/ no/yes/ no]
[Ch 02] [Pg 02] [Cell 02] [V/C Id: 1/ 2] : time: 00:10:16.25 / 30 fps [Pos: 00:12:11.25] [Frames: 21955] SP/ILVU/DISC/SA:[yes/ no/ no/ no]
[Ch 03] [Pg 03] [Cell 03] [V/C Id: 1/ 3] : time: 00:10:59.20 / 30 fps [Pos: 00:23:11.15] [Frames: 41745] SP/ILVU/DISC/SA:[yes/ no/ no/ no]
[Ch 04] [Pg 04] [Cell 04] [V/C Id: 1/ 4] : time: 00:11:14.20 / 30 fps [Pos: 00:34:26.05] [Frames: 61985] SP/ILVU/DISC/SA:[yes/ no/ no/ no]
[Ch 05] [Pg 05] [Cell 05] [V/C Id: 1/ 5] : time: 00:13:32.20 / 30 fps [Pos: 00:47:58.25] [Frames: 86365] SP/ILVU/DISC/SA:[yes/ no/ no/ no]
[Ch 06] [Pg 06] [Cell 06] [V/C Id: 1/ 6] : time: 00:00:06.00 / 30 fps [Pos: 00:48:04.25] [Frames: 86545] SP/ILVU/DISC/SA:[yes/ no/ no/ no]
[Ch 07] [Pg 07] [Cell 07] [V/C Id: 2/ 1] Layer Br.: time: 00:00:10.19 / 30 fps [Pos: 00:48:15.14] [Frames: 86864] SP/ILVU/DISC/SA:[ no/ no/yes/ no]
[Ch 08] [Pg 08] [Cell 08] [V/C Id: 2/ 2] : time: 00:00:00.15 / 30 fps [Pos: 00:48:15.29] [Frames: 86879] SP/ILVU/DISC/SA:[yes/ no/ no/ no]

PGC_2 (program chain): [Title(TTN): 2] [00:03:26.15 / 30 fps] (Programs: 3) (Cells: 3) (uses VOB-IDs: 3,4,7)
[Ch 01] [Pg 01] [Cell 01] [V/C Id: 3/ 1] : time: 00:01:49.00 / 30 fps [Pos: 00:01:49.00] [Frames: 3270] SP/ILVU/DISC/SA:[ no/ no/yes/ no]
[Ch 02] [Pg 02] [Cell 02] [V/C Id: 4/ 1] Layer Br.: time: 00:01:37.00 / 30 fps [Pos: 00:03:26.00] [Frames: 6180] SP/ILVU/DISC/SA:[ no/ no/yes/ no]
[Ch 03] [Pg 03] [Cell 03] [V/C Id: 7/ 1] Layer Br.: time: 00:00:00.15 / 30 fps [Pos: 00:03:26.15] [Frames: 6195] SP/ILVU/DISC/SA:[ no/ no/yes/ no]

PGC_3 (program chain): [Title(TTN): 3] [00:03:38.29 / 30 fps] (Programs: 3) (Cells: 3) (uses VOB-IDs: 5,6,8)
[Ch 01] [Pg 01] [Cell 01] [V/C Id: 5/ 1] : time: 00:01:49.14 / 30 fps [Pos: 00:01:49.14] [Frames: 3284] SP/ILVU/DISC/SA:[ no/ no/yes/ no]
[Ch 02] [Pg 02] [Cell 02] [V/C Id: 6/ 1] Layer Br.: time: 00:01:49.00 / 30 fps [Pos: 00:03:38.14] [Frames: 6554] SP/ILVU/DISC/SA:[ no/ no/yes/ no]
[Ch 03] [Pg 03] [Cell 03] [V/C Id: 8/ 1] Layer Br.: time: 00:00:00.15 / 30 fps [Pos: 00:03:38.29] [Frames: 6569] SP/ILVU/DISC/SA:[ no/ no/yes/ no]

Menu Language Units: 1
Language Menu Unit 1: [Japanese]

Language Menu Unit 1: [Japanese]
Menu 1: [Root-Menu] (entry PGC) (Programs: 1) (Cells: 1) (uses VOB-IDs: 1)

[jel]

i can see no need to demux this vts by vob-id

[leowong1]

if not, how can i back up the dvd ?

[jel]

you really have to be a bit more specific ...
what programs are you using to demux/re-author with?
what programs are you familiar with?

[leowong1]

I am using DVD decrypter to demux the required assets for reauthoring.
I am gonna use Scenarist to Reauthor the DVD.

I have a question here though. If I demux by PGC, the original DVD structure will be different? I summe the structure will only have 3 VOB ID, but not the original 8 VOB ID?

[jel]

well, to be honest, if this was me, i would use an easier approach:

1. doitfast4u to demux your assets
2. scenaid (with 'use original assets' selected, if your not re-encoding) to create your scenarist .scp file and import into scenarist.
3. in scenarist, add your additional subs, and compile
4. use batchupdateifo to update your ifos with 'copy subtitle tables' selected.

hth
j

[leowong1]

thx a lot, but i have a little confused. should i demux by vob-id in DoItFast4U?
I heard people said that, 1 m2v = 1 vob-id. If i demux by PGC, there will only be 3 m2v which will result in 3 vob-id only which is not the same as original dvd, and in that case, i cannot use ifoedit to update the ifo?