[digiKam-users] Windows File Properties (such as tags) do not show in digiKam 7.2

[Gilles Caulier]

Actually, it used to show the whole metadata supported in the dedicated
viewer.

For DNG converter, exiftool is used to backport all original metadata from
RAW to DNG. Code :

https://invent.kde.org/graphics/digikam/-/blob/master/core/libs/dngwriter/dngwriter_postprocess.cpp

We have a parser and a manager here :

https://invent.kde.org/graphics/digikam/-/tree/master/core/libs/metadataengine/exiftool

Code is extendable of course with the power of exiftool.

Gilles Caulier

Le mer. 7 juil. 2021 à 16:59, José Oliver-Didier <jose_oliver at hotmail.com>
a écrit :

> Thanks Gilles,
>
> I have not had a chance to try out 7.3.0 with Exiftool support, eager to
> do so. Back in January, I opened Bug 432265
> <https://bugs.kde.org/show_bug.cgi?id=432265>. Attached to the bug there
> is a sample file with a problematic XMP condition caused by modifying the
> Geo Tags in Windows Photo Gallery.
>
> I am curious to know - In which operations Exiftool is used by Digikam?
>
> On Wed, Jul 7, 2021 at 2:48 AM Gilles Caulier <caulier.gilles at gmail.com>
> wrote:
>
>> Hi,
>>
>> The good news for the future is the official support of ExifTool in the
>> next 7.3.0 release. We already perform advanced operations that Exiv2
>> backend is not able to do.
>>
>> https://i.imgur.com/o2WLFI5.png
>>
>> So perhaps this kind of problem can be done in digiKam directly without
>> using ExifTool CLI directly.
>>
>> Feel free to open a file in bugzilla about this topic for future
>> integration.
>>
>> Best regards
>>
>> Gilles Caulier
>>
>> Le mar. 6 juil. 2021 à 23:53, José Oliver-Didier <jose_oliver at hotmail.com>
>> a écrit :
>>
>>> Hello,
>>>
>>> I am also a long time Windows Photo Gallery (WPG) user. I am slowly
>>> migrating into using Digikam as my primary photo manager. I wrote a blog
>>> post a while ago which details where WPG writes the metadata to in the file
>>> and how to access it using Exiftool which may be of help -
>>> https://jmoliver.wordpress.com/2017/02/12/accessing-windows-photo-gallery-metadata-using-exiftool/
>>>
>>> - It is my understanding that for JPG files File Property Keyword
>>> metadata is written back to file, unless of course the file or folder has a
>>> read-only attribute enabled.
>>> - Digikam should be able to read XPKeyword tags (legacy Windows XP
>>> metadata locations), do make sure you have you have Exif.Image.XPKeywords
>>> for Read and Write operations in Digikam's Metadata Configuration (From the
>>> menu bar click on Settings -> Configure Digikam, click on Metadata and in
>>> the Advanced tab click on "Tags" on the dropdown) as having "Image tags"
>>> checkbox enabled in "Write this information to the Metadata".
>>> - I recently stumbled upon an issue in which for some files the metadata
>>> was not read by Digikam. After some research, I discovered that if images
>>> were edited in WPG (Example: Straighten image, adjust contrast...) or WPG
>>> "Geo Tags" added, certain oddly crafted XMP metadata would be written back
>>> to the file which has been problematic to other applications such as
>>> Digikam. In Digikam, the XMP file metadata will not be read and thus not
>>> displayed. To correct the issue, I used Exiftool to "rebuild" the file XMP
>>> so that Digikam could be able to read it. The problem and how I was able to
>>> mitigate this issue is detailed in this Exiftool forum post -
>>> https://exiftool.org/forum/index.php?topic=12367.msg66881
>>>
>>> Hope this helps, and as always, when performing file modification
>>> operations, do make sure you have a backup of your files. Test with a
>>> subset of images first.
>>>
>>> - J Oliver
>>>
>>>
>>>
>>> On Fri, Jun 18, 2021 at 1:32 AM Gilles Caulier <caulier.gilles at gmail.com>
>>> wrote:
>>>
>>>> Hi,
>>>>
>>>> The Windows file properties depends of proprietary Windows database
>>>> that we don't access or extended properties located in file system
>>>>
>>>> This is why you don't see this information in digiKam.
>>>>
>>>> Best
>>>>
>>>> Gilles Caulier
>>>>
>>>> Le jeu. 17 juin 2021 à 15:38, <mytea4-kde at yahoo.com> a écrit :
>>>>
>>>>> Hello – I am new to digiKam in the past year and have been searching
>>>>> the documentation and websites for this issue with no luck.  Hopefully
>>>>> someone with more experience can point me in the right direction.
>>>>>
>>>>>
>>>>>
>>>>> Over the past 20yrs, I have primarily used Windows File Explorer to
>>>>> tag photos.   In the past I’ve also used, on occasion, Shutterfly local
>>>>> tools and Windows Photo Gallery, both of which have become defunct.   When
>>>>> I view pictures in File Explorer or Windows Photo Gallery, I see my tags in
>>>>> the Details pane.   I can use the File Explorer search function to find all
>>>>> pictures with those tags.
>>>>>
>>>>>
>>>>>
>>>>> Yesterday I discovered that for SOME pictures (on various cameras) the
>>>>> tag/keyword had been written into exif field XPKeywords.  For a small set
>>>>> of pictures, the tag is written into the IPTC Keywords field; I believe
>>>>> these are pictures I tagged with digiKam or with ExifDateChanger Pro.   But
>>>>> for the VAST MAJORITY of my pictures, the tag is just in the Windows File
>>>>> Properties Tag/Keyword, not in exif or iptc.  I also used IrfanView to view
>>>>> the exif & iptc information to try and verify what was present in the file
>>>>> metadata.
>>>>>
>>>>>
>>>>>
>>>>> digiKam does not seem to read the Windows File Properties fields so I
>>>>> can’t search for pictures by my tags.
>>>>>
>>>>> My pictures are taken on 10+ cameras and have various Exif versions
>>>>> over the years, but the problem exists across all of these.   I have
>>>>> pictures from 2020 with that XPKeywords field (with my tag in it) in the
>>>>> exif data, and other pictures from 2020 without it (that I had never
>>>>> tagged), so this isn’t just related to older or newer pictures.   The issue
>>>>> spans all  years, all cameras.
>>>>>
>>>>>
>>>>>
>>>>> I tried going to digiKam Tag Manager Tool > Read Tags from Image – but
>>>>> no luck.
>>>>>
>>>>>
>>>>>
>>>>> Is this a bug in digiKam?   Or is there some other tool I need to use
>>>>> in Windows to force it to write my tags into the exif (or iptc) keywords?
>>>>>
>>>>>
>>>>>
>>>>> To be clear, on the vast majority of my photos, the exif data does not
>>>>> even include the XPKeywords field; when a tag had somehow been applied to
>>>>> the exif data, it seems to have inserted that XPKeywords field.
>>>>>
>>>>>
>>>>>
>>>>> I really want to migrate all my photo organization work into digiKam,
>>>>> but can’t do that until I learn how to get my tags to show up.
>>>>>
>>>>> Appreciate any and all advice or direction.
>>>>>
>>>>>
>>>>>
>>>>> Jaimi
>>>>>
>>>>
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