Trouble decrypting disc

[Wobblybob]

Hi there

Been some time since i've been in the forum but have hit a snag that seems to complicated to be covered by previous threads, however apologies if i'm covering old ground. I'm hoping someone can help :confused:

I have a dvd+r that work have given me as they're having problems with it. They cannot view it on standalone machines.

The content itself appears problematic...

XP sees the disc and it's label is 'logical volume identifier', it's file system is UDF. There are numerous vob, ifo, bup files on the disc, the larger ones i'm presuming to represent the actual pieces of video, the smaller ones representing the menus.

Trouble is,

1) the disc has seen better days and i'm getting cyclic redundancy errors when i try to copy the files over to hdd. Unless cd check or some other data retrieval (any tips?) works i fear the rest of this post is irrelevant.

2) Nero showtime 4 will play the vob files separately, although it thinks i need dvd-video multichannel plugin & dolby R plugin.

3) No other software will play the disc.

4) dvd decrypter gets 1% into a copy then fails with error 'On-the-fly patching failed' VTS *** is not a valid vob file.

5) dvd author will not import from the source wizard stating the files are not valid.

I dont know where to go from here. The end result is i'm hoping i can provide them with a copy/reauthored copy they can play on PAL standalone dvd machine.

Not sure what other info you'd need to assist in this but i'll be very grateful and happy to supply it on request.

Sincerely
Wobblybob

[blutach]

Try ISOPuzzle to make an ISO. But it might be the disc is too damaged.

Regards

[Wobblybob]

Hello

thanks for the reply blutach:)...looked isopuzzle up and dl'd it together with the aspi layer. Am I right in thinking that's just a retrieval method to hopefully get a reasonable iso?

If succesful, my dvd machine will play iso's, is this true of all dvd players? or will i need to burn back to dvd files with something like dvd decrypter on iso write, or nero? sorry if that's a naive question:stupid:

kind regards
wb

[blutach]

Yes, it will retreive badly damaged discs (to the extent they can be retreived). After that, mount it with Daemon Tools and manipulate the files as you wish.

Regards

[setarip_old]

@Wobblybob

Hi!I have a dvd+r that work have given me as they're having problems with it.Nero showtime 4 will play the vob files separately, although it thinks i need dvd-video multichannel plugin & dolby R plugin.Based on your description of the audio, this sounds like it's a backup of a commercial DVD. Don't the people at your place of employment have the original, from which you could make a new copy?

[Wobblybob]

hi folks

@ blutach - Cheers. gave isopuzzle a go...see below

@ setarip...

Based on your description of the audio, this sounds like it's a backup of a commercial DVD. Don't the people at your place of employment have the original, from which you could make a new copy?

I think the original came from Canada, it's a group based program, so whilst the original probably exists it might be hard to track down...

Isopuzzle ran for 3 hours last night and managed to retrieve 69% but the last 3rd of the disc didn't appear readable. After it hit over 2000 errors and had 480000 missing sectors i gave up on the basis the data was largely unrecoverable.

Any idea what the dangers are of leaving my dvd reader (optiarc NEC) running for extended periods of time (even with cooldown enabled), is there a reasonable limit before you would call a disc too badly damaged?

all the best
wb

[setarip_old]

I think the original came from Canada, it's a group based program, so whilst the original probably exists it might be hard to track down...If it is, as I've speculated, a commercial DVD, what is the title?

[Wobblybob]

cant see enough of the title screen to tell you exactly....

It is a collection of vignettes regarding the perpetration of domestic violence and how facilitators may approach working in groups to reduce the risks of it occuring.

It's licenced to the probation service so no copyright issues but dont know the title exactly

[setarip_old]

Well, that's obviously not a readily available commercial DVD, whatever its title ;>}
So much for the thought of tracking down another original...

[Wobblybob]

i know...:)

listen folks thanks for your suggestions....i think i'm just gonna tell them there's nothing i can do...

I've tried extracting the vobs, creating new ifo's etc but dvd shrink says invalid data in vts file.

it's rapidly becoming more complicated than i can manage, which is a shame 'cos i don't like being beaten by technology:mad:

all the best, :thanks: for your advice
wb

[setarip_old]

Based on your statement that the DVD may have originated in Canada, you might want to review the links resulting from the following Googlesearch, to see if you trip across something familiar:

http://www.google.com/search?hl=en&q=%22domestic+violence%22+and+%22DVD%22+and+%22Canada%22&aq=f&oq=

[Wombler]

listen folks thanks for your suggestions....i think i'm just gonna tell them there's nothing i can do...


Two things come to mind which may or may not apply depending on your circumstances may but I thought I'd mention them anyway in case you find them useful.

Firstly try reading the disc in your DVD writer instead of a ROM drive as writers are more sensitive and are frequently more capable of recovering damaged discs.

Secondly no one has mentioned this but is the disc physically damaged i.e. is it difficult to read because of scratches?

If so you could try repairing the disc.

This is normally suggested for pressed originals, not recordable discs, but in these circumstances you've got nothing to lose and I don't see any reason why it shouldn't also work for a scratched DVD+R.


Wombler

[JTEE]

Have you tried polishing the disc?
I Have a little gadget that can usually restore damaged (scratched) discs to the point where they can be read with a good drive & appropriate software.
You can probably get one at WalMart or Radio Shack, but like any good polishing job, it will take some time.

[CWR03]

Is there an adhesive label on the disk? They tend to shrink and warp it and pull the surface out of tolerance of the laser. Soak it in warm water for a few minutes, pat it dry and try to copy it to a hard drive before it dries again. You can also score the paper, but be careful - if you cut the reflective layer it's ruined.

You can tell if it's warped by holding it and another disk playsides together, and the edges should touch.