How to change navigation/decision flow?

[Gorr]

For example i have a main menu a submenu with two options.
Option 1 select widescrean vts and show the movie.
Option 2 select 4:3 vts and show the movie.

To be taken to this submenu user presses the play button.

Now how can i discard the submenu altogether and reroute the play button to desired vts?

Thanks

[bluespot]

It would be nice if something like this were possible, but from everything that I've seen, there is no way to manipulate existing DVD menus. This includes changing navigation, disabling/deleting buttons, and several other useful things. This is one of the things that is never really addressed by anyone...what happens if you try to use a button on a standalone that leads to a VOB or vts set that has been removed? Depends on the player, but most of them will freeze. Yeah, I know, don't try to use menu options that you removed. But sometimes I'm able to keep the extras on a disc, sometimes not...and I've done enough where I can't always remember which. This is a problem, IMO.

[rpa]

I think I was able to get rid of this screen and let the movie plays directly. Yah.. it was 'The Atlantis' dvd from Walt Disney. I guess all I did was rip out the cell id (using ifoedit) that pertains to this selection screen and it plays directly using the default aspect ratio which is wide screen. Of course, blueshot is correct, this functionality is yet to be desired. But try it...

[Gorr]

Hi rpa,
How do you do cell ripping stuff?
If this is really works, this be in the guides I think.

Thanks

[Gorr]

hello bluespot,
> what happens if you try to use a button on a standalone that leads > to a VOB or vts set that has been removed?

if you assign "nop" to the button, nothing will happen and of course the player will not hang.

[rpa]

All I did was use vobrator to find which vob ids pertains to that selection screen then use ifoedit to rip out the cell. Use GET VTS and that's it. The idea is the same as ripping out the FBI logo. This is not a proven solution so don't blame me if it doesn't work. Different dvds has different structures. Nothing to loose though if you try it.

[bluespot]

Gorr, thanks for the tip, but I have to admit that this is the first time that I've heard of assigning 'NOP' to a menu button.

Could you please tell me how to do this...which software to use, how to locate specific buttons within specific menus?

BTW, ripping out cells with IFO edit can sometimes have strange effects on the structure and navigation of DVDs. I'm not saying don't do it, just backup your work before you try!

[Gorr]

hi again bluespot,


Gorr, thanks for the tip, but I have to admit that this is the first time that I've heard of assigning 'NOP' to a menu button.


This stuff comes from scenarist. NOP stands for "no operation".
The sequence of creating menus is as follows:

1 defining buttons (like drawing).
2 assigning operations or commands to the buttons.

After step 1, we have button operation defined as nop. If we compile project into final files we will have menus with regular buttons in there, however the buttons will simply not function or do any good to the project.

All button commands are kept in ifos. I actually have seen them in ifoedit. However when trying to manipulate or edit existing commands you are presented with hex editor window and if you don't know how the information should be looked like in hex sequence, you lost.

I suspect all buttons should have their ids defined in vobs. Ifos should contain the actuall assigment of commands to each button id found in vob file.


Could you please tell me how to do this...which software to use, how to locate specific buttons within specific menus?


As of yet I don't know of such software. This maybe yet something to be developed.
I believe this should not be a very hard task provided we know how the information is kept in vobs and ifos.

regards

[smoof]

Your going to have to learn how to read the programming language used by DVD's in order to do what you want. IFOEdit 0.91 has made modifying the commands very easy. Just go into the PGC table and look for the Pre and Post commands, these are the navigation commands for the DVD.

Now suppose you know that you have removed title 4 from a DVD, if you see a Pre/Post command that says Jump to title 4 then you know it's going to be a problem. Just change the command to a NOP or Jump to main menu or whatever you want. You do this by right clicking on the command and then IFOEdit will allow you to change it.

Just do a lot of trial and error and eventually you'll get the hang of it.

[Gorr]

hi smoof,
no doubt I will:)