[digikam] [Bug 337422] New: Embedded Thumbnail EXIF data not updated when writing metadata to image

[Michele]

https://bugs.kde.org/show_bug.cgi?id=337422

            Bug ID: 337422
           Summary: Embedded Thumbnail EXIF data not updated when writing
                    metadata to image
           Product: digikam
           Version: 4.1.0
          Platform: unspecified
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Metadata
          Assignee: [hidden email]
          Reporter: [hidden email]

After adjusting the date of some photos to subtract 6 hours, the EXIF data of
the image and of the embedded thumbnail (directly embedded by the camera) are
not the same.
The image EXIF data are fine and reflect the update I have done, whilst the
thumbnail data are untouched and are still aligned to the original time.
Please refer to the attached URL for the example.

Reproducible: Always

Steps to Reproduce:
1. Select an image with an embedded thumbnail
2. Image -> Adjust Time and Date...
3. Subtract 6 hours (for example), then press apply
4. Image -> Write metadata to image (first make sure the option to write the
metadata timestamp to the image is ticked)

Actual Results:  
The image and the Embedded Thumbnail have different timestamp

Expected Results:  
Embedded Thumbnail has same timestamp as the image

Screenshot with the problem in Digikam:
https://dl.dropboxusercontent.com/u/151071/Embedded_Exif_Digikam.png

Sample image:
https://dl.dropboxusercontent.com/u/151071/DSC00193.JPG

I am flagging the severity as "Normal" as there is no easy workaround: Shotwell
is using the thumbnail data for some (strange) reason, and although you could
remove the thumbnail or update it using 'exiftool', this is something that only
a power user could be able to achieve.

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[Michele]

https://bugs.kde.org/show_bug.cgi?id=337422

--- Comment #1 from Michele <[hidden email]> ---
After a few test, I realized that also the "Date and Time (digitalized)"
timestamp is not updated when writing the metadata, while the "Date and Time
(original)" is. Very likely Shotwell is reading the "digitalized" value.
Nautilus and EOG are reading the "original".

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=337422

Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[hidden email]
            Summary|Embedded Thumbnail EXIF     |EXIF thumbnail data not
                   |data not updated when       |updated when writing
                   |writing metadata to image   |metadata to image

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=337422

Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|EXIF thumbnail data not     |EXIF thumbnail date
                   |updated when writing        |information not updated
                   |metadata to image           |when writing metadata to
                   |                            |image

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=337422

--- Comment #2 from Gilles Caulier <[hidden email]> ---
About Comment #1 : Date time original and digitized are updated in Exif. Look
code here :

https://projects.kde.org/projects/extragear/graphics/kipi-plugins/repository/revisions/master/entry/timeadjust/task.cpp#L125

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=337422

Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Product|digikam                     |kipiplugins
          Component|Metadata                    |TimeAdjust

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=337422

--- Comment #3 from Gilles Caulier <[hidden email]> ---
Git commit b592338fb85547b1f8467a228360bbae8db2ecb0 by Gilles Caulier.
Committed on 21/10/2014 at 08:34.
Pushed by cgilles into branch 'master'.

set Exif thumbnail date time tags when date is changed

M  +1    -0    libkexiv2/kexiv2image.cpp

http://commits.kde.org/libkexiv2/b592338fb85547b1f8467a228360bbae8db2ecb0

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=337422

Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Version Fixed In|                            |4.5.0
         Resolution|---                         |FIXED
             Status|UNCONFIRMED                 |RESOLVED
      Latest Commit|                            |http://commits.kde.org/kipi
                   |                            |-plugins/25ff30d3db53fa68db
                   |                            |d940bb73c125504fac4144

--- Comment #4 from Gilles Caulier <[hidden email]> ---
Git commit 25ff30d3db53fa68dbd940bb73c125504fac4144 by Gilles Caulier.
Committed on 21/10/2014 at 08:35.
Pushed by cgilles into branch 'master'.

Handle Exif Thumbnail Date time tag in list possible Exif tags to update from
TimeAdjust kipi-plugin
FIXED-IN: 4.5.0

M  +4    -4    timeadjust/actionthread.cpp
M  +2    -3    timeadjust/actionthread.h
M  +11   -11   timeadjust/clockphotodialog.cpp
M  +1    -1    timeadjust/clockphotodialog.h
M  +7    -4    timeadjust/myimagelist.cpp
M  +2    -2    timeadjust/myimagelist.h
M  +5    -2    timeadjust/plugin_timeadjust.cpp
M  +1    -1    timeadjust/plugin_timeadjust.h
M  +19   -11   timeadjust/settingswidget.cpp
M  +4    -4    timeadjust/settingswidget.h
M  +16   -7    timeadjust/task.cpp
M  +1    -1    timeadjust/task.h
M  +15   -12   timeadjust/timeadjustdialog.cpp
M  +3    -3    timeadjust/timeadjustdialog.h
M  +4    -1    timeadjust/timeadjustsettings.h

http://commits.kde.org/kipi-plugins/25ff30d3db53fa68dbd940bb73c125504fac4144

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[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=337422

[hidden email] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|TimeAdjust                  |BatchQueueManager
            Version|4.1.0                       |unspecified
            Product|kipiplugins                 |digikam

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[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=337422

[hidden email] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|BatchQueueManager           |BatchQueueManager-Tool-Time
                   |                            |Adjust

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