registry team mailing list archive

[Adam Dingle <adam@xxxxxxxxx>]

To be a bit more precise, existing photo collections' tags (i.e.
keywords) are normally stored in IPTC and/or XMP data (EXIF can't really
hold keyword data).  The trunk build of Shotwell can now read IPTC/XMP
keywords from photo files; these become Shotwell tags after an import.
So this feature will be present in 0.6.

It's true that we have a ticket (#1290) for storing Shotwell tags in
photo files.  We're currently debating, however, whether Shotwell will
do this on the fly or only when the user exports photos explicitly.
We're currently leaning toward writing tags out only during an export
operation, because if we always store tags in photo files then tagging
becomes a relatively expensive operation.  A user might quite reasonably
want to apply a tag to 100 photos, but if we need to write that tag to
100 10 Mb photo files then now we need to write 1 Gb of disk data in
order to apply the tag (since we may need to rewrite an entire photo
file in order to insert a new tag into it).

Some other photo programs (e.g. Picasa) do, however, write tags out on
the fly; others (e.g. iPhoto, Aperture) do not.  F-Spot gives the user
the option whether to do this.

-- 
Use EXIF data for tags
https://bugs.launchpad.net/bugs/579804
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