SPRM Question

[rdbello]

What kind of information could I record in a empty SPRM? stay record permanently?

Thanks

[ultimatebilly]

SPRMs are system parameters, they store information like the default language for the menus, the stream IDs and so on...
Here is an explanation from mpucoder http://mpucoder.kewlhair.com/DVD/sprm.html

SPRMs are partially read-only, and these values usually stay, or are set each time you switch on the player.
You can store values in GPRMs, those are 16 bit registers, which can store integer values...
This gives you the opportunity to add some logic to your navigation, for example if this menu was already played, jump directly to the next menu...
These values are deleted if you stop the player or switch it off...
I don't think it is possible to store any values permanent in the player (except from the parameters you set via the player menu, like the default language etc...)

[Lord of the Discs]

I don´t think that there are empty SPRM´s.

When you put a DVD in the player, it picks the values for
the default languages, subpics (on/off and which stream),
which button to highlight and so on, from the disc and puts
them in the acording SPRM´s.

These are the things the author usualy pre-defines for his DVD´s
(with expensive high-end software or a freeware called IFOedit).
It is done with command sets and is pretty complicated.

So much about this.

LotD

[Crazyjoe]

There are some empty SPRM's, but the are reserved for further improvements to the dvd standard.

Some of the SPRM's can be changed by the user via the dvd player setup (default language etc.). But you cannot "write" SPRM values via navigation parameters. You can only read and write GPRM's. Those you can compare to SPRM's to influence your navigation.

GPRM's are also the only way to a very "powerful" dvd navigation. :sly:

[Lord of the Discs]

One simple example:

which button gets highlighted (SPRM 8)

enough?

LotD

[Crazyjoe]

Originally posted by Lord of the Discs
One simple example:

which button gets highlighted (SPRM 8)

enough?

LotD

OK, I forgot abou that... ;)
At the moment we've got here VERY HOT weather...maybe my brain's already boiling... :D

[Lord of the Discs]

no problem, Crazyjoe,

SPRM´s really can bring heads to boil,
even without hot weather :)

LotD