Hi,

yes Graham, you are right. My usecase is digitizing of negatives (or slides) :

 * starting with "DateTimeOriginal" set to date/time of digitizing
   process (useless)
 * all images originally taken at the same day moved into one folder
   named YYYY-MM-DD
 * batch processing with exiftool setting "DateTimeOriginal" of all
   images in this folder to "YYYY:MM:DD 12:00:00"
 * import into darktable
 * selecting / processing / sorting / geotagging (if possible)
 * fine tuning time with geotagging module (if possible and reasonable)

This workflow fails for dates before 1970-01-01.

Best regards

Peter Harde


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