| Registered: March 13, 2007 | | Posts: 2,759 |
| | Posted: | | | | Quoting dee1959jay: Quote:
Depending on when a Disc ID was submitted to the database, you'll encounter different versions. Not sure if the short ID version is still around though - could be limited to DVDP 2.x. The short ID is completely different to what we use as disc ID today. The short ID has never been used in the disc section of any profile neither at Invelos nor at Intervocative. The short ID has only been used as an alternative profile ID (when no UPC is available) in the days of Intervocative (2.x). The new long disc ID is a hash over many features of a DVD implemented by Microsoft. It is known to be very unique for practical purposes. While theoretically two different discs could share the same hash, no such case is known to me. On the other hand the short ID is directly given by the authors during mastering. It should have been unique. But history has shown that some studios have used the same ID several times, which made it less than optimal as a profile id. |
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 | Blair | | Resistance is Futile! |
| Registered: October 30, 2008 |  Posts: 1,249 |
| | Posted: | | | | Ok, so it was generally what I was beginning to assume. Not knowing how ID's were generated (I thought at first they were read as markers directly off of the discs) it didn't make sense to me that the old ID had a 16-character sequence but the updated one didn't have the same 16-character sequence. If it's somehow hash-based, though, the updates could be more comparable to moving from a basic checksum with DVDP 2.x, to MD5, to SHA. (Weak example, I know.) Thanks for the clarification  | | | If at first you don't succeed, skydiving isn't for you.
He who MUST get the last word in on a pointless, endless argument doesn't win. It makes him the bigger jerk. | | | | Last edited: by Blair |
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| Registered: February 23, 2009 | Reputation:  |  Posts: 1,580 |
| | Posted: | | | | Quoting dee1959jay: Quote:
The ID's themselves haven't changed, the way Profiler reads them has. AFAIK there were three stages: 1) short Disc ID's (something like 8 digits); 2) extended Disc ID's (significantly longer); 3) Disc ID + Disc label (addition to the extended ID of a disc label, which can either be an indication of the release or generic (e.g. [DVDVolume]).
Depending on when a Disc ID was submitted to the database, you'll encounter different versions. Not sure if the short ID version is still around though - could be limited to DVDP 2.x. Thanks for the info! I wasn't aware of that and it's very useful to know! | | | Blu-ray collection
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| Registered: March 19, 2007 | Reputation:  |  Posts: 6,018 |
| | Posted: | | | | You're welcome, Taro. |
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