What is considered an official CRC?
I have only come across AniDB recently, signed up and started to make MyList - and discovered that someone already added some files that I had ripped from HKDVD a while ago... the CRCs that this person put in do match the CRCs I had generated...
CRC - what's official?
Moderator: AniDB
An official CRC is the CRC32 the releaser of the file (hopefully) published. If it isn't published right with the fille. it might be generated from the original file, as long as you are sure, that there is no corrution in it (eg. that file matches the oficially released MD5). So if you relesed a rip, you should genarate SFV and/or MD5 files and publish those along with your release, as then people can check, if teir version of the file is perfect.
Usually you can find official CRCs
- on IRC in the release channel
- on the group's website
Unreliable sources are
- envirosphere
- filenames (also filenames from BitTorrent)
It more than once happened to me that the filename had a "[xxyyzz]" in it (xx yy and zz beeing the CRC values) where somebody simply generated the crc and put it in the filename and then shared it. People thought that this is the official crc and spread the word.
I then found that in the IRC channel a completely other CRC was given as the official one.
So usually you should try checking the IRC release channel or the website for those official values OR AniDB because usually AniDB has good values because it is checked via active users and PetriWs AniDB-o-Matic which helps sort out those problems. If a user has a different file it will generate feedback to the user and then that user might try to get more information whether his CRC is right, he might check the website of the group and then the value might be corrected. Envirosphere does not have this kind of feedback system.
- on IRC in the release channel
- on the group's website
Unreliable sources are
- envirosphere
- filenames (also filenames from BitTorrent)
It more than once happened to me that the filename had a "[xxyyzz]" in it (xx yy and zz beeing the CRC values) where somebody simply generated the crc and put it in the filename and then shared it. People thought that this is the official crc and spread the word.
I then found that in the IRC channel a completely other CRC was given as the official one.
So usually you should try checking the IRC release channel or the website for those official values OR AniDB because usually AniDB has good values because it is checked via active users and PetriWs AniDB-o-Matic which helps sort out those problems. If a user has a different file it will generate feedback to the user and then that user might try to get more information whether his CRC is right, he might check the website of the group and then the value might be corrected. Envirosphere does not have this kind of feedback system.
Regardless of the few wrong entries at enviro, I'd mostly consider it a good source. Especially new animes should(tm) have the correct CRC listed.Skywalka wrote:Unreliable sources are
- envirosphere
- filenames (also filenames from BitTorrent)
And, just to avoid a misunderstanding that might occur after reading that CRCs in filenames can be unreliable sources: It always depends on the source. If the torrent is published directly by the group, it's of course the official CRC (well, except for a-x maybe...).
If it's redistributed on one other pages, though, the CRC in the filename might easily have been altered and shouldn't be considered official unless it matches the one available on the hompage/in the channel.
So, in case they aren't marked "CRC valid" yet, please change those of the according file-entries that match your CRCsI have only come across AniDB recently, signed up and started to make MyList - and discovered that someone already added some files that I had ripped from HKDVD a while ago... the CRCs that this person put in do match the CRCs I had generated...
