Remove Useless Stuff calls in sequence a lot of functions. All of those functions are available from the DVD, Domain or PGC menus, but Remove Useless Stuff launches them all, in a particular order. The goal is to simplify the DVD as much as possible, without breaking the navigation. It is not new, but it has been expanded with several new functions in v9.3.
Examples:
- Most authoring programs are based on templates, and they create usually several PGCs in each menu domains that are used only in some very specific cases. When PgcEdit detects that some of these PGCs are not useful, it removes them automatically.
- Remove Useless Stuff tries also to remove the "dead commands", which are the commands that can never be executed and are therefore useless. By freeing them, some PGCs can become uncalled, and PgcEdit can remove them as well. (The dead commands stuff is new in 9.3.)
You can turn any of the cleanup function off before launching the Remove Useless Stuff. So, if you don't like a feature of Remove Useless Stuff, you can skip it. Personally, I use that function usually immediately after having ripped the DVD, to remove most useless stuff, but I like to keep the NOPs, as they are sometimes used as GOTO targets, and keeping them can be useful when I modify the navigation manually. When I have finished my edits, I launch it again, and that time, I remove also the useless NOPs.
Anyway, try it! As far as I know, this function is safe to use, and it can help to understand the structure of the DVD. It can even sometimes regain some disc space, by removing uncalled PGCs or VTS.
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