Random DVD menu start

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Random DVD menu start - 5/4/2007 12:47:50 AM

mart

Posts: 2
Joined: 4/24/2007
Status: offline

Random DVD menu start (1)

I found interesting trick on some film dvd, where was randomly started menu. How they did it?

No problem for us :-).

At first, we must prepare DVD in Studio. For our example can be used this structure:

Intro clip, which will be played at the beginning of DVD
Menu 1 - first variant of menu
Menu 2 - second variant of menu
Video clip - video clip (we set "jump to menu 2" - M2 at the end of this clip)

Next, we render this dvd to HDD.

For editing IFO files is used IfoEdit (http://www.ifoedit.com).

Start IfoEdit and open file VTS_01_0.IFO from our DVD.

Go to VTS_PGCITI. There are 2 items. The first item is our intro clip and the second is video clip.

If video clip is with chapters, there will be item for each chapter.

Now, click to VTS_PGC_1 and find 1.Cell Command in bottom part of window.

This command sets "jump to menu 1". But we want command "jump random to menu 1 – 2".

So, we change command Set GPreg<2> mov (set-val)<1> to Set GPreg<2> rnd (set-val)<2>.

(set-val)<2> means, that last menu which can be started is 2 (we have two menus).

And how to edit it?

Double click to command and change 71 00 00 02 00 01 00 00 to new hex value 78 00 00 02 00 02 00 00.

Note: 78 sets random value, 02 is string number (2) and 02 is count of menus. Values are in hex
code (10=A, ..), and can be get from scientist calculator in windows (for example).

Command was changed

We set random menu on dvd start, next we want random menu after video clip is played.

It is easy, we define similar command at the end of the last chapter in video clip.

Go to VTS_PGCITI and VTS_PGC_X (where X is number of last chapter - for our example it is

VTS_PGC_1). Find 1.Cell Command and change it from

71 00 00 02 00 02 00 00 (Set GPreg<2> mov (set-val)<2>) to

78 00 00 02 00 02 00 00 (Set GPreg<2> rnd (set-val)<2>).

That is all, now we can save and test it.

Tutorial translated from czech Studio fan site, sorry for my english

. PDF download here.

Post #: 1

RE: Random DVD menu start - 5/4/2007 12:54:47 AM

mart

Posts: 2
Joined: 4/24/2007
Status: offline

Random DVD menu start (2)

This how-to describes easy way to start dvd with random menu.

In previous how-to was used "intro clip" to define string value, which decides about menu start.

Now, we define thist string in VIDEO_TS.IFO/VMGM_MAT/First Play PGC (directly after dvd is

started).

For editing is used IfoEdit (http://www.ifoedit.com).

Start IfoEdit and open file VIDEO_TS.IFO from our DVD.

Go to VMGM_MAT and First Play PGC in the list.

Somwere below is PreCommand (JumpSS VTSM) Jump to TitleSet ...

This command do jump to menu. There is command Set GPreg<0> mov (set-val)<1> before them, which sets jump to menu 1 (sets value 1 for string GPreg<0>). We change this command to set random value 1 - 2.

How to edit it?

We change command GPreg<0> to value 78 00 00 00 00 02 00 00 in hex editor.

Note: 78 sets random value, 00 is string number (0) and 02 is count of menus. Values are in hex code (10=A, ..), and can be get from scientist calculator in windows (for example).

Command was changed to Set GPreg<0> rnd (set-val)<2>.