On 06/04/2012 20:47, Lucas Beeler wrote:
There might be a third option. If
my db is ok, and the problem is
hotwell parsing the library, then
if I nuke the exif tags on all my
images and allow shotwell to
re-write them from its db, that
might work?
In theory this approach should actually work. That said, make sure to
backup your photo library (I'm assuming it's large so you might want
to use an external USB or FireWire hard disk for this purpose) before
nuking all the tags in all the photos in your library. Assuming that
your Shotwell database does have correct hierarchical tag information
in it (which you check by using, say, SQLiteMan) and if you turn
metadata writing on, then correct hierarchical tag information should
be written back to the photo files when you start Shotwell. Note that
you may have to set the file modification timestamp on all of your
photo library files to a date before your last database update
timestamp to get this to work.
My first attempt certainly seemed quite promising, but I think it needs
refining. My tags and ratings are all there, but things, such as GPS
co-ordinates, (which are important for me), are gone.
Presumably this is a result of the sledgehammer command I used, i.e:
exiftool -all= <fname>
and it should be just a matter of refining the exiftool switches to
remove tag info only.
Next step is to restore the images (110GB) from backup, then have a look
at the exiftool man page again and the tags. If anyone can help with a
form of the command line that would amount to something along the lines
of "remove all the tags and keywords, but leave everything else" I would
be very interested. I guess if I play with 'exiv2 -pa' on a few images
as Adam suggested it might give me an idea of what to feed to exiftool
to tell it what to remove. There may be other tools - I've used jhead in
the past to strip exif data but didn't find it too reliable.
Dougie
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