Comments on: File format reverse engineering, an introduction.

By: Arvin

Arvin — Wed, 23 Feb 2011 20:22:33 +0000

I thought itc2 files are encrypted whereas normal itc files are not, which seems very similar to what you have described here.

I wonder if the added support of png is what makes the new itc2 format?

By: Mactub

Mactub — Sat, 15 Jan 2011 20:27:15 +0000

In your example Track ID is 17534 ( in iTunes Library.xml) but in the name of the extracted file it is 89F13E74F2072465. I am wandering how to get from 89F13E74F2072465 to 17534?

By: Mactub

Mactub — Wed, 12 Jan 2011 16:10:25 +0000

Yes I did that and I know what are you talking about but my question was about names of images generated by your code. The first part of the file name has to be TrackId but it is in some format which I do not understand. Could you please tell how can I make it the same as TrackIDs in ‘iTunes Library.xml’ file ?

By: nada

nada — Tue, 11 Jan 2011 00:18:07 +0000

@mynab I havn’t upgraded my iTunes yet so I don’t know if the new version has changed the way files are stored. Do you only have one .itc2 file in your ‘iTunes\Album Artwork\Cache’ folder? I’m assuming that you have the artwork for more than one album loaded into iTunes. How large is this file? I may upgrade shortly and poke at the new formats.

@Mactub: The first part of the image filename should be excatly the same as the string value of the ‘Persistant Id’ key. Have you tried opening the ‘iTunes Library.xml’ file in notepad and searching for the value eg: ‘FEEDDEADBEEF0321′?

-nada

By: Mactub

Mactub — Mon, 10 Jan 2011 15:38:03 +0000

Sorry for silly question but could you explain in which way do you represent TrackID in the first part of the name of extracted image? I can not get TrackID the same as in XML library.

By: mynab

mynab — Wed, 05 Jan 2011 06:23:20 +0000

Hello, I cannot find how the new iTunes names the itc2 file for an album. There is only one file and the ID used in the filename does not seem to match any of the PresistentID of the album tracks. Searched all the places I could where the album PersistentID but to no avail. Has anybody more hints on that?

Thanks!

By: nada

nada — Mon, 07 Jun 2010 12:13:23 +0000

You need to provide the path to your iTunes folder, it doesn’t work with an individual file.

By: Slurpie

Slurpie — Sat, 29 May 2010 11:51:14 +0000

Probably a newbie question for this site, but how do I load the file on the dumper? I tried “itc2-dump sample.itc2 in cmd but nothing happens.

By: nada

nada — Sun, 28 Mar 2010 02:12:54 +0000

For all albums/tracks the itc2 filename is based on the library id (first set of characters) and the track id, which I beleive to be randomly generated. For an album with multiple tracks there is only one itc2 artwork file, which is named as above for one of the tracks. In an album the itc2 filename is not always generated from the first track in the album.

Hope this answered your question,

-nada

By: enj0ywh

enj0ywh — Sat, 27 Mar 2010 15:16:35 +0000

Hi nada,

very nice work! I was wondering whether you found out how iTunes generates the filename of the .itc2 cover file if it is downloaded from the web? As far as I see it, there is only one cover file for an album with several tracks.