[Digikam-users] some questions

Gilles Caulier caulier.gilles at gmail.com
Thu May 14 20:02:28 BST 2015

2015-05-14 19:39 GMT+02:00 Johannes Kapune <listen at kapune.de>:
> Dear all,
> thanks for improving Digikam.
> Now I use DigiKam 4.10.0 on openSUSE 13.2
> Maybe my questions are related to my (wrong) work flow?
> First my hardware configuration:
> My pictures are placed on a NFS-share on my server directly imported to
> local machine via fstab
> for this my digikam4.db and also my thumbnails-digikam.db is on local hd
> DigiKam is configurated to store all metadata in picture (I have a backup in
> a safe place!)
> My question now is: Is the face rectangle also stored in picture or is it in
> database?

Both. face region are stored to XMP. Look with metadata viewer for details.

> I ask this because I had problems when choosing all pictures (~ 95.000
> pictures) in one part than generating thumbnails and fingerprints crashes
> DigiKam. For this I only choose a part of all of pictures to get faces named
> but will I loose this named faces now when choose only other part of
> pictures?

Backtrace of the crash please.

There is already a report about but under Windows. No suitable
backtrace can be generated.

When you generate fingerprint did you use maintenance tool ? Did yiu
use multi-core option ?

> If faces are stored in pictures and there will be no loss What can I do
> later to get access to all pictures including fingerprints and thumbnails?
> Maybe my observation is related to some wrong work flow but I see several
> times that after I ordered faces to pictures next time I start DigiKam again
> some faces are connected to wrong name.
> After this I can't find a solution to bring this faces back to "unknown".
> Even if I choose this tag and I hit "OK" there is no change and I can not
> confirm in any other way. Do I make a mistake here?

Select and image in icon view and :

1/ look if face region tags are visible in XMP (MP and MWGR
namespace). Example :


2/ try to use More>Sync DB with metadata from Caption & Tags side bar.

> Only option is to delete the face rectangle completely or to confirm that
> this is no face - but both is not I want to do.
> I would like to bring this faces back to "unknown" because some of this
> faces I do not know and if I have them in one place every visitor can easily
> help me to name this "unknown faces".
> Thanks in advanced
> Johannes
> PS Do you see a chance to get the mysql database back on server so we can
> use same database from several client machines (not at same time)?

If we can find a student to work on it. For the moment no. We are
focused to KF5 port. After we will see.

Gilles Caulier

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