SUMMARY see $SUBJECT STEPS TO REPRODUCE 1. import photo with this date string in EXIF metadata or XMP sidecar metadata 2. watch console output OBSERVED RESULT Digikam::MetaEngine::Private::printExiv2MessageHandler: Exiv2 ( 2 ) : Failed to convert Xmp.xmp.ModifyDate to Exif.Image.DateTime (Invalid date string, after day) Digikam::MetaEngine::Private::printExiv2MessageHandler: Exiv2 ( 2 ) : Failed to convert Xmp.photoshop.DateCreated to Exif.Photo.DateTimeOriginal (Invalid date string, after day) Digikam::MetaEngine::Private::printExiv2MessageHandler: Exiv2 ( 2 ) : Failed to convert Xmp.xmp.CreateDate to Exif.Photo.DateTimeDigitized (Invalid date string, after day) EXPECTED RESULT No errors. These dates ("YYYY:MM:DD HH:MM:SS" and "YYYY-MM-DDTHH:MM:SS", optionally with .ssss sub-seconds appended) were created with a CANON IXUS 330 camera (old, but was widely used). Using most current Git appimage on KDE Neon 18.04 with all current updates applied.
Can you share your cannon images to test her ? Gilles Caulier
With sample images found on the web this IXUS 330 has no abnormalities, images has normal date format and have no XMP section. Maik
Created attachment 119202 [details] exiftool JSON export of example image Here is an exiftool JSON export which you can reapply to any image. It's the original image exported from Apple iPhoto without modifications (at least the file size and the mtime did not change). IMHO: Date strings like "YYYY:MM:DD HH:MM:SS" with an optional "+NNNN" or "+NN:00" timezone string appended (without or with space delimited) could be parseable by Digikam without harm even if they are not standard.
Json file applied to an empty JPEG file, only normal EXIF metadata of an IXUS camera can be found. There are no abnormalities with the date format. The "Flash" metadata is a struct field, but that's a different topic. Maik
Your problematic date format is the ISO8601 format. After a quick look into the specifications I can not see that the colon is allowed as a date separator, colon is for the time. Valid are: YYYYmmdd YYYY-mm-dd Maik
This problem has been solved, digiKam no longer writes the date in XMP with a colon, but with the hyphen. Maik