How do I correct a Root/Title Menu Problem?

[Link Baby]

Quick question (I hope!) - I have a DVD that has a small problem. Within one of the video clips, if you hit the Menu button, you are returned to the Root Menu instead of the Title Menu.

What is the best way to fix this? I was already modifying the disc with PGC Edit, but I don't know how to fix this in PGC Edit, assuming that this is even the best tool to use.

Any help would be appreciated! :)

[r0lZ]

By definition, the Title Menu button returns always to the title menu (or does nothing.)

Of course, it is possible to redirect the navigation from the title menu to the root menu, and that can give the impression that the title menu button calls the root menu. This technique is even used often, as DVDs with real, useable title menu are extremely rare.

Anyway, it is not possible to explain how to "fix" your DVD without much more info, as every DVD is different. Try to follow the navigation with PgcEdit in trace mode, and you will probably understand why the navigation returns to the root menu.

[Link Baby]

By definition, the Title Menu button returns always to the title menu (or does nothing.)

Of course, it is possible to redirect the navigation from the title menu to the root menu, and that can give the impression that the title menu button calls the root menu. This technique is even used often, as DVDs with real, useable title menu are extremely rare.

Anyway, it is not possible to explain how to "fix" your DVD without much more info, as every DVD is different. Try to follow the navigation with PgcEdit in trace mode, and you will probably understand why the navigation returns to the root menu.




Well, to do that I need to mimic the action of pressing the "Menu" button on a DVD Player's remote control. The only thing I see in PGC Edit that looks like it might do that is the Return button. Assuming that I'm correct, pressing that after closing the Preview window of the video clip in question does not yield the same results as pressing the Menu button on a DVD Player (or a software player).

When I press the Return button in PGC Edit, here's the relevant log clip:

------------------------------------------

******* Start playback VTST 2 , 1 TTN 1 (0:32) Title 5...
******* Playing Program 1, Cell 1 (0:32.07) (Chapter 1)
-> sprm(7:Chapter number (or PGN)) = 1 (0x0001)
!!!!!!! USER: GoUp Button: GoUpPGCN = 0. No action.
******* End playback of PGC 1.
-- post 1 : (CallSS) Call the VMGM PGC 1, resume cell 1
------> Entering VMGM , LU 1 (en) , 1 (1:00) 7b. TitleM

------------------------------------------


It ends up going back to the Title Menu. This is the behavior I want - but what actually happens in a software or hardware player is that it's returning to the Root Menu instead.


Does that give you the info you need to understand what the problem is?

[blutach]

In trace mode, there is a button called Title and one called Root. These lead to the Title Menu (in VMGM) or the Root Menu (in the VTS you are in).

If they are greyed out at any time, it means it is prohibited to press the button at that time (eg PUOps might exist).

To go to the root menu, we'll need to know exactly where the menu is. That title menu looks like it does something (it has 7 buttons). Typically, if the root menu is in the same VTS, you can change the call to the title menu in the post commands to a call to the root menu. (Post commands --> Call menu PGC in current VTS).

However, if it is in a different VTS, then you will need to jump there via VMGM. (Post commands --> PGC in VMG --> Menu PGC in a different VTS). Such is the way DVDs are authored due to the rather restricted command structure.

Regards

[r0lZ]

Again a brilliant explanation, blu!

Note also that, in trace mode, it is not possible to activate a navigation button when the current navigation pointer is on a VM command. Something must be playing to use the virtual remote. However, for technical reasons, it is not possible to use the buttons when the preview window is opened. You have to close it (with Close and Break.) Then, press the Title button.

You have pressed the GoUp button (also called Return.) Since the GoUp link is 0, that button does nothing. You have been redirected to the Title menu anyway because it's the first post command executed at the end of the playback.

If, when playing Title 5, you can't press the Title button, you have to change the PUOs of the Title 5 PGC. Untick "Menu Call - Title (1024)". Then, verify with a software player, as it is also possible that you have to remove the PUO in the VOB files (with the PUO plugin.)

[blutach]

Very high praise coming from you r0lZ! :thanks:

Regards