Why are there sometimes many "no group" listings?

All your questions about AniDB belong in here.
No download support!

Moderator: AniDB

Locked
micronicos
Posts: 3
Joined: Sat Aug 14, 2004 5:41 am
Location: London, UK.

Why are there sometimes many "no group" listings?

Post by micronicos » Tue Mar 20, 2007 3:03 pm

First to thank AniDB for being a great resource - I use you almost daily.

My query is to why some titles have many "no group" entries - often identical?

Example - Serial Experiments Lain:
http://anidb.info/perl-bin/animedb.pl?s ... 1#eid_1981

More curious than anything else .....

Regards,
Nico M

User avatar
ricce
Posts: 199
Joined: Wed Apr 06, 2005 8:42 pm
Location: Sweden / Västrås
Contact:

Post by ricce » Tue Mar 20, 2007 4:18 pm

It, to me looks like a file that have become damaged during transmission and now exits in several variants that only differs by checksums in AniDB.

As we are talking about no or unknown group it is difficult to figure out which of the files are the orginal (undamaged) file as there is no official CRCs.

Those files where most likely initially realeased on a p2p netwok that don't makes any good sanity checks on downloaded material and the downloader did not detect the damage before resharing it.

Those files are often in bad quality and tend to be hard to find, so you should ignore them anyway.

AniDB should have all damaged or variants of a file. If we can figure out which of the files or the original file the other should be marked "invalid CRC" and/or "Eyecancer" (In quality field).

micronicos
Posts: 3
Joined: Sat Aug 14, 2004 5:41 am
Location: London, UK.

CRCs huh ....

Post by micronicos » Tue Mar 20, 2007 4:48 pm

Thanks, I hadn't thought of that, I should see what I can find about how AniDB acquires items for listing .... I guess they have bots that are then manually inspected & they don't want to throw anything away unless indisputably incorrect.

And you are right - I compared a few files of identical length of Lain 1 & they all have different checks of all 4 types.

Regards,
Nico M

suppy
Posts: 151
Joined: Mon Jan 31, 2005 10:37 am
Location: A House of the Azath

Post by suppy » Tue Mar 20, 2007 6:05 pm

no .. no bots. it's all done by all the members of anidb.

Hoerie
Posts: 79
Joined: Sun Aug 07, 2005 12:15 pm
Location: Delft

Post by Hoerie » Tue Mar 20, 2007 6:05 pm

Files with incorrect CRC's are in the db if they are widespread through the community. AniDB doesn't really acquire items (to my knowledge) but members add new files,episodes,animes, etc.

Amour
Posts: 640
Joined: Fri Oct 08, 2004 5:19 pm
Location: France

Re: CRCs huh ....

Post by Amour » Tue Mar 20, 2007 9:44 pm

micronicos wrote:I guess they have bots
We only use qualified AI.

Locked