commands in VOB vs. IFO files

[riprazor]

Certain commands exist in each IFO file which are associated with a menu page. They are listed as a series of Pre, Post and Cell commands. Similarly, each menu VOB file contains a number of commands which are associated with a button. One can edit the buttons using tools like menuedit.

Can someone tell me where the actual code that is executed exists when you select a specific button on a menu page or do these buttons interact with the commands that exist in the IFO file? I ask because I recently edited a VOB file in which every button on the page had the exact same command, yet selecting each button, resulted in a different page chapter. I assume that the button commands were actually referencing the IFO files commands.

Thanks,
Riprazor

[violao]

Originally posted by riprazor
I ask because I recently edited a VOB file in which every button on the page had the exact same command...
And I suspect that would be LinkTailPGC?

In the Post-Command section of the corresponding PGC you will find a bunch of IF commands that inspect the currently highlighted button (system register 8) and then branch accordingly. I love this kind of DVDs.

[riprazor]

You are exactly correct!