INTRIGUING "protected" DVD title access menus

[Arky]

Not a perfect solution, but take look at this creative idea - it's intriguing:

http://www.creativecow.net/forum/read_thread.php?threadid=86414&forumid=55&postid=102225844945681

Comments please?


Arky ;o)

[tom para]

d/o mean to pop your bubble but this is a fairly old thing. Back in 1999, Sonic used to have a downloadable tutorial on how to do this. Later they took it down. When others requested it, they said it was so easily defeated that it was laughable as an anti-whatever device.

I'm not a programmer so I d/o know why it was "easily defeated."

tom para

[TRILIGHT]

I think it's a pretty cool idea. :) Sure, it's not going to provide you some huge crypto protection but it would allow for other interesting features. I like "out of the box" ideas.

[auenf]

"easily defeated":

play a dvd in windows media player 8 (XP) and you'll have a list of all the VTS' on the dvd, and every chapter within them, and you can skip to wherever you want whenever you want.

Enf...

[Jestorius]

We had a tread about the same thing. Here is my solution, it can be used on a training DVD etc.:

Let say the pincode is 2234

Make 4 menues with the nummeric pad on it. On the top of the first menu you can use the same text like: Type your first ....
On the second menu: Type your second ... etc.

You have 10 buttons on each menu page. You gonna need 5 Command Sequences. You need 5 free GPRM's to work with.

Place this one in the FirstPlay
1. Command Sequence

MOV GPRM0,0
MOV GPRM1,0
MOV GPRM2,0
MOV GPRM3,0
MOV GPRM4,0
JUMP TO MENU1
---------------------
Link it to all the buttons on the 1. Menu
2. Command Sequence

MOV GP0, SPRM8
DIV GP0, 1024
MOV GP1, GP0
JUMP TO MENU2
--------------------
to all the buttons on the 2. menu
3. Command Sequence

MOV GP0, SPRM8
DIV GP0, 1024
MOV GP2, GP0
JUMP TO MENU3
---------------------
on 3. menu
4. Command Sequence

MOV GP0, SPRM8
DIV GP0, 1024
MOV GP3, GP0
JUMP TO MENU4
-------------------
on 4. menu
5. Command Sequence

MOV GP0, SPRM8
DIV GP0, 1024
MOV GP4, GP0
GOTO LINE 6 IF GP1=2
JUMP TO "TRY AGAIN"
GOTO LINE 8 IF GP2=2
JUMP TO "TRY AGAIN"
GOTO LINE 10 IF GP3=3
JUPM TO "TRY AGAIN"
JUMP TO MOVIE IF GP4=4
JUMP TO "TRY AGAIN"

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

You have to make a "try again" menu. If the numbers aren't correct than it jumps to the "try again" menu if they are correct it jumps to the Movie.

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

[Arky]

@ Tom Para: Well I still like the idea, even if it's only for fun! :p :D

How are you mate? haven't seen you for ages, since Flexion went offline ;)


Arky ;o)

[auenf]

one of these days, im going to dig every little trick thats hidden on these forums and create one dvd with it all, then i can finally get some sleep.

Enf...

PS, woo, should be burning Karaoke DVDs tommorrow, only taken like 4months to get to this point...

[rubic42]

In addition to creating a menu which will allow you to jump to the title, couldn't you create a set of Pre PGC commands that check the GPRMs as well, and if they don't match then it'll jump right back out to the menu? This way skipping directly to the title using the remote will still encounter some password checking.

Am I wrong?

[Nogami]

No, I most definately did not use this type of method to create a "playback protected" DVD with um... Cute nekkid women on it ;P

Absolutely not.

For sure.

But if I did, I'd certainly do some other interesting things like playing with the options to restrict remote control functions, putting the video between chapter marks tagged to go back to the main menu, etc.

It IS possible to override the "protection", but it's not going to happen unless you rip the VOBs to a HD. No set-top player can get around it if you're sneaky enough.

It was a good experiment though. Looking into some ways of hiding easter eggs on authored DVDs as well.

[Jestorius]

My metod is something I'm using on training dvd-s. The pincode is actually the answare from the user. If the user's answare is wrong than I show the corresponding part of the training video. The user can't go to the next level before answaring all the questions correct.

[auenf]

Originally posted by Nogami
It IS possible to override the "protection", but it's not going to happen unless you rip the VOBs to a HD. No set-top player can get around it if you're sneaky enough.


most DVD players only seek thru the chapters in the current VTS when using the skip buttons, but some will go onto the next VTS at the end of the current VTS, which means its going to get to your supposedly 'hidden' footage sooner or later ;)

Enf...

[Nogami]

Another way to do this would be to use a 2nd angle. Make a primary video angle at extremely low bitrate (could just be a black screen for the length of whatever you're trying to protect), and add a 2nd angle (and a 2nd audio track) with the "real content" on it.

Then disable the angle button on the user's remote control.

The only way to get at the other angle (other than demuxing the vob) is to make a command sequence that would enable it if the user punched in the correct code.

N.

[tom para]

@ Hi Arky ! D/o pop your bubble; did I ?

The angle thing is pretty nifty. I commend.

Or hide the eggs in the VMG or VTS menu areas and don't provide any arrow to it other than lots of scrambled links and checks. Only drawback is 1 Gig limitation on VMG and VTS menus.

Another possible way to discourage out-of-spec players from going into protected VTS is to create barriers consisted of short GOPs or route playback into into a wild goose chase using cell/PG/PGC links and random-generator functions (ie, "if random is n, goto y; otherwise, goto z...". (Notice I said "possible", meaning my guess only.)

Scenarist manual has a tut on creating tests.

[Arky]

:angry: <+ SULKS

lol :p


Well, ever-so-SLIGHTLY, Tom para, but I didn't take it personally - the point is that the post has already generated loads more useful discussion on a more-workable bunch of devious tactics!! :D

Regards,


Arky ;o)

[Arky]

Originally posted by tom para

Scenarist manual has a tut on creating tests. [/B]


the Scenarist manual!!!! ARGGGGHHHHH!!!!!!! :( :confused: :scared: :eek: :rolleyes:

"you CANNOT be SEEERIOUS!!!"

lol


Arky ;o)