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Generating DVDID programmatically

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the_dude

Wed Mar 26 2008, 02:49PM

Registered Member #7854

Joined: Wed Mar 26 2008, 09:16AM
Posts: 2

Hello-

I have the need to generate a DVDID programmatically. I have used several tools (My DVD Settings included), but I need to be able to auto-generate that hash.

Does anyone know of a command-line application or a code snippet?

Carlton Bale

Fri Apr 11 2008, 06:55AM

Registered Member #6955

Joined: Thu Feb 21 2008, 10:15AM
Posts: 1

I'm trying to find out that info myself. It *MIGHT* be just a CRC64 hash of the DVD Serial number. I think this is how the My DVD Settings program generated the DVDID.XML file from the DVD Profiler data. I don't think it actually looks at files on the DVD.

Channing

Wed Aug 13 2008, 08:34PM

Registered Member #8642

Joined: Sun May 04 2008, 08:10AM
Posts: 1

The key to doing it is the Windows API call "IDvdInfo2::GetDiscID". You can search MSDN for more info.

Here is a sample app I wrote that does it from the command-line:

(UPDATE: Don't know why anything that starts a "less-than" symbol is getting a semi-colon added after it. Just remove the semi-colon right after the less-than symbol from the sample code)




#include "stdafx.h"

#include <atlbase.h>

#include <DShow.h>

#include <conio.h>



int _tmain(int argc, _TCHAR* argv[])

{

    CComPtr<IDvdInfo2> pInfo;

    ULONGLONG id = 0;

    HRESULT hr = 0;



    hr = CoInitialize(0);

    if(SUCCEEDED(hr))

    {

        hr = pInfo.CoCreateInstance(CLSID_DVDNavigator);

    }

    if(SUCCEEDED(hr))

    {

        hr = pInfo->GetDiscID(NULL, &id);

    }

    pInfo.Release();

    CoUninitialize();



    printf("DiscID: %X|%X\n", (int)(id >> 32), (int)(id & 0xFFFFFFFF));



    _getch();

    return 0;

}

[ Edited Wed Aug 13 2008, 08:39PM ]

Gimpnuts

Sun Sep 07 2008, 12:40AM

Registered Member #4366

Joined: Tue Sep 18 2007, 06:09PM
Posts: 45

Here is a command line tool that I wrote that does what you ask. The proper syntax is:

DVDinfoGen [drive letter] [/fullinfo]

The drive letter is optional, as the program will find all DVD drives installed on your system and use the first drive that has a disc in it if you omit it. If you have multiple DVD drives, I suggest you supply the drive letter regardless. The fullinfo switch will grab the DVD ID, download the dvd info from the web, clean the name up (removing things like "[Special Edition][2 Discs]", download the cover art (cover art is stored in c:\programdata\dvdcovers) and modifies the dvdinfo data to point to the locally stored cover art so that it doesn't download from the web anymore. The program will then display the dvdid xml data to the console. If you want to write this data directly to a file, pipe the output to a file. See the example below.

DVDinfoGen e: /fullinfo > c:\dvd\Bridge_to_Terabithia.dvdid.xml

You must extract both files and they must be located in the same directory together. This program requires the .NET Framework 2.0 runtime installed to work correctly.

Lastly, if AnyDVD is installed, it will self-register with AnyDVD to patch itself into the list of approved programs that AnyDVD will pass the CRC64 to unmodified. If AnyDVD is installed, it will only do this once, and then notify you that it did so and tell you to run the program again to generate the correct DVDid.

I wrote this tool as a means to help cache my collection of nearly 400 movies stored on a 3.5TB Media Server (even running on Gigabit, it took forever to download the covers and info each time) - I used this program in conjunction with another that I wrote that sweeps through all of the dvd items cached in Media Center to cut the time necessary to display the dvd library down to roughly 20 seconds (from 2 minutes).

You can download the file at: http://uploaded.to/?id=8mztft

I hope you find this useful Enjoy!

[ Edited Sun Sep 07 2008, 12:49AM ]

Gimpnuts

Wed Sep 10 2008, 09:16PM

Registered Member #4366

Joined: Tue Sep 18 2007, 06:09PM
Posts: 45

Has anyone tried this program yet? Did you find it useful?

Alezis

Sun Sep 14 2008, 12:07PM

Registered Member #11185

Joined: Sun Sep 14 2008, 01:04AM
Posts: 3

Gimpnuts wrote ...

Has anyone tried this program yet? Did you find it useful?

That seems to work with an actual dvd in the drive by what I understand... this wouln'd work with dvd on hard drive then...

Gimpnuts

Sun Sep 14 2008, 06:45PM

Registered Member #4366

Joined: Tue Sep 18 2007, 06:09PM
Posts: 45

No. Although I could modify this program to generate a dvdid from hard drive, it is unreliable and subject to changes to the dvd structure caused from any outside interference with the standard dvd structure and processes (shrinking the dvd, AnyDVD, DVD43, removing any part of the dvd, etc). Using a CRC checksum provides a means of identifying a legitimate, unmodified original disc, and these processes and programs fundamentally change that checksum.

We need to remember that the DVDID is actually a CRC of multiple files on the discs structure, and changing a single bit or byte will result in a drastically different DVDID being generated. It is because of this that of the few programs capable of generating a DVDID, virtually none allow this to be done from the hard drive. There is no reliable method of doing this, and this is why the dvdid.xml files are recognized in the first place, they provide a means of overriding what previously would have been a completely useless checksum. Think of it as both identification and verification.

As far as the caching portion of the program is concerned, this program represents a first-party methodology when the dvd is first ripped. I will be releasing another program here shortly that will gather up all the dvdid information from media center, and cache it after-the-fact. If you are interested in that (it's a huge time saver for large libraries like many of us here have), then keep watch on these forums as I will release it here first.

John S

Sat Oct 04 2008, 03:03PM

Registered Member #11393

Joined: Sat Sep 27 2008, 10:36AM
Posts: 1

Gimpnuts wrote ...

Has anyone tried this program yet? Did you find it useful?

It generates the dvdid.xml file perfectly. Thanks!

But I tried it with the /fullinfo switch and it doesn't seem to be writing the other files. I can see it accessing the Internet and dowloading the xml and folder.jpg....but can't seem to find where they are written. I created a c:/programdata/dvdcovers folder, but nothing is getting written there.

Thanks again. Getting the dvdid is the hardest part. Would be cool if I could also cache the metadata as well.

T-F

Fri Dec 19 2008, 01:29PM

Registered Member #12925

Joined: Fri Dec 19 2008, 12:07AM
Posts: 3

I just tested it and it works! I am just starting to migrate my DVD media to VMC and I want to try using just DVDinfoGen and the built in VMC capabilities to get basic DVD cover & meta data. I'll let you know who it goes. Thanks again for sharing!

jgriffin

Sat Jan 10 2009, 11:44PM

Registered Member #2112

Joined: Sun Apr 08 2007, 12:46AM
Posts: 5

Hey Gimpnuts. Great program! Works really well.
You mentioned that you had an app that swept through the exisiting library to pre-cache the information the way this app does. Any chance of making that available?

Thanks

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