Okay, got a thorny question, but, it's been bugging me for a long time now. However, there doesn't appear to be an easy answer because of the nature of the question. So, I'm just going to toss it out and see what answers I can get. :)
How is it that the protections that are added to DVD's to prevent copying them that are created and added AFTER a standalone DVD was made do NOT affect playback on most standalone DVD players?
Or, maybe a better but more difficult way to ask it is how can protections, like CSS, on DVD's make it impossible for anything but DVD player software to see data on the disc and yet cause no problems on a standalone? How is it that complex protections that are introduced to keep data from being read on a PC DVD drive without that data being read by a DVD player software do not mess up the play back on a standalone DVD player?
I guess the bottom line is what is the difference between the PC and a standalone player that makes it so that the newer protections don't crash a standalone DVD player and yet still work to prevent the data being copied from the PC. I've wondered this for a long time now and realized that the answer wouldn't just be out there because, if it were, then the guts of DVD players and DVD's themselves would be out and about in the open. As opposed to the bits and pieces of information that are laid out there as people find them. :)
So, can anyone answer and understand LOL this question? Thanks!
your question is admirable but the simple thing is that the protection that is on a DVD is made to stop people from copying, right. It is therefore made to make players read disks properly.... but while the drives that have write capability will have a problems copying ....... that's the way it's made! So they make the protection as a two way sword..... drives that read only and drives that can read and write! It's built in that way! Just simple reasoning. Isn't technology grand? I'm sure there are geeks out there making their own burners to break any encryptions so that their drives won't have any problems copying DVDs....... but consider the fact that the industry makes new encryptions often enough that it's easier to make software than to constantly make newer burners to defeat the new encryptions.... or to keep making new firmware to do the same! Just simple reasoning! That's what makes AnyDVD so great..... it keep up with all the new encryptions and updates as often as the encryptions do! So there you have it. DVD players are out there.... old and new.... and yet the encryptions stop the burners from copying it and play properly on the old players as well as the new! It's called DVD Standards. So they make the encryptions to hold up to the DVD Standards and that's basically the whole story!~ at least that's my take on it..... I may be wrong... I don't claim to be a know it all. Just my 2 cents.
Quote:I'm sure there are geeks out there making their own burners to break any encryptions so that their drives won't have any problems copying DVDs
How do you do that? There is no programming language in a burner that you can use to instruct what it should read and how for individual discs. A firmware does not handle copy protections.
Quote:make newer burners to defeat the new encryptions....
Hope you are not suggesting that we should buy a new burner every time Sony updates their ARccOS protection?
Back the the OP:
The ifo files will instruct the player on what to play. If you have a disc protected with unreadable sectors - the ifo file will just tell the player to avoid/jump over those parts of the VOB file. When you then try to rip such a VOB file - the ripper tries to rip all sectors included in that VOB file and gets stuck with a CRC or I/O error. So the ripper needs also to be smart enough to interprete the instructions in the ifo files to avoid those unreadable sectors.
The disc can also be filled with titlesets that are there of the only purpose to stop the ripper. Titlesets that are never played when you run it thru a software player or on your standalone player.
thank you Cynthia_ as I was only rationalizing and even said:
Quote:at least that's my take on it..... I may be wrong... I don't claim to be a know it all.
and you taught me another thing about DVDs.... I knew that there are IFO, BUP , and VOB files on a DVD and didn't know what they were. Now that you explained what an IFO file does to the DVD what does the BUP files do?
I still don't see how it's done. :) Because I know some standalones use PC drives in them to help them read a larger brand of media types better. The way I saw it, the only way it would seem to work where the standalone can read the new IFO's without being told anything new internally and the PC not being able to do it was if there was some kind of translating layer in the drives or Windows itself. But, that would mean that you could put a DVD drive in, say, a Windows 98 setup and as long as you had company drivers, get the DVD recognized in an older Windows flavor and read them.
Plus, the idea of AnyDVD, when it is loaded as "TSR" (Ancient term, I know.) that serves as a translating layer that allows the files to be recognized by the PC.
So, it's based on unreadable sectors, then? If that was the case, though, then, shouldn't it have been possible to copy files "in real time" by merely opening a DVD player software, playing a movie, and then accessing the drive? Granted, that would be super slow down due to two reads asking for swaps back and forth between buses. But, it should have worked... granted been so slow as to make it not worth anyone's while to do it.
It's just something that has always confused me. And I even have a degree in computer science. LOL (Actually, I do. Well, technically, it says Mathematical Sciences, but, I studied under computer science.) And served as a beta tester on... a certain something... for about 2 years, now serving it on ImgBurn. So, it's not like I don't know a little about this... just enough to make it embarrassing that I don't know! :>
