Hi Phil, thanks so much for developing ExifTool it's wonderful.
I want to change the filemodifydate of my jpg files to datetimeoriginal if it's not the same, here's the command:
exiftool '-filemodifydate<datetimeoriginal' -r -if '(not $datetimeoriginal eq $filemodifydate) and ($filetype eq "JPEG")' .
However it changed ALL jpg files even if both dates are identical, as I found out the reason is that filemodifydate has timezone while datetimeoriginal has not:
exiftool '-filemodifydate' '-datetimeoriginal' .
======== ./DSC00216.JPG
File Modification Date/Time : 2010:10:18 13:01:58+08:00
Date/Time Original : 2010:10:18 13:01:58
======== ./DSC00214.JPG
File Modification Date/Time : 2010:10:17 16:37:01+08:00
Date/Time Original : 2010:10:17 16:37:01
So how can I modify the syntax so that it can compare the 2 dates correctly?
Many thanks
Try this:
exiftool '-filemodifydate<datetimeoriginal' -r -if '$datetimeoriginal ne substr($filemodifydate,0,19)' -ext jpg .
(here I have used the -ext option to save on having to read non-jpg files)
- Phil
It works! Thank you so much! :)