• I want to use the “description” metadata from darktable [1] as caption in WordPress.
    In german language there are some characters which are not in ASCII but in Unicode/UTF-8.
    Umlaute: ä ö ü ß -> HTML: ä ö ü ß
    When a developed raw-picture is exported as JPG from darktable, then the “description” metadata is embedded into the exif-data.
    description whithout “umlaute” is written to EXIF ImageDescription field (ascii).
    description WHITH “umlaute” is written to EXIF UserComment field (unicode).

    As written in [2] the UserComment will be imported to wordpress:

    (string) Set to a non-empty value of one of the following fields (see source code for the precise logic involved):

    EXIF UserComment field if [“title”] is unset AND EXIF:ImageDescription is less than 80 characters

    But for pictures with “umlaute” the caption in wordpress stay empty.

    [1] https://docs.darktable.org/usermanual/4.0/en/module-reference/utility-modules/shared/metadata-editor/
    [2] https://developer.wordpress.org/reference/functions/wp_read_image_metadata/#more-information

Viewing 3 replies - 1 through 3 (of 3 total)
  • Thread Starter Frank Jäger


    Test from linux-shell on exported JPG:

    $ exiv2 -pa 20230311_0052.jpg | grep Darktable-Test
    Exif.Image.ImageDescription Ascii 28 Darktable-Test Beschreibung

    $ exiv2 -pa 20230311_0067.jpg | grep Darktable-Test
    Exif.Photo.UserComment Undefined 49 Darktable-Test Beschreibung Umlaut äöü

    Thread Starter Frank Jäger


    With some configuration it is possible to export

    • Xmp.dc.title
    • Xmp.dc.description
    • Xmp.acdsee.notes

    … out of Darktable, but no IPTC-fields.

    Xmp-data cannot be imported? This will be a work-arround, when “Exif.Photo.UserComment Undefined” refuse to load.

    Thread Starter Frank Jäger


    Sorry, maybe my posts affects the plugin “EXIF Caption” more than “EXIF details”. The caption after import is empty, when description is in EXIF.UserComment.

Viewing 3 replies - 1 through 3 (of 3 total)
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