QuickTime tags for purchased iTunes music

[francois]

Two little additions:

- atom \xa9day currently has label Year. I found a complete date in purchased songs. E.g.:

2001-09-01T07:00:00Z
2006-07-14T07:00:00Z

In iTunes, it's labeled Release Date and displayed with month/day/year (without time). Maybe you can change the label in ExifTool so it makes sense for a year or a date. "Release time"?

- atom rtng (Rating) value 1 means Explicit, like value 4. All songs marked Explicit in my iTunes library have this value 1.

[Phil Harvey]

- atom \xa9day currently has label Year. I found a complete date in purchased songs. E.g.:

Unfortunate.  I have an old reference that calls this "Content Created Year".  I should check my old QuickTime book when I get home, but it could be that the meaning of this tag has changed.  If it has just changed, then I will leave ExifTool as it is.  But if ExifTool was wrong from the beginning, then I will fix it.

- atom rtng (Rating) value 1 means Explicit, like value 4. All songs marked Explicit in my iTunes library have this value 1.

Thanks.  It appears as if this has changed (see Feb 12, 2013 comment).  I will update this.

- Phil

[Phil Harvey]

The original QuickTime reference calls atom ©day "Date the movie content was created", so I should change this.  ContentCreateDate would seem appropriate, but not very appealing.  I will go with ReleaseDate as called by iTunes.

Edit:  Hmmm.  I have just noticed that the ©day atom may also be stored inside the udta atom, and here the tag is called CreateDate.  All of the atoms common to both udta and ilst have consistent names except this one.  Perhaps I should rename them both to ContentCreateDate instead.  I have been thinking about this, and I don't think that ReleaseDate makes sense for home-made movies, and there are other CreateDate tags which have different meanings.