renaming files by setting FileName from DateTimeOriginal modified with ShiftTime

[tim_rylance]

(This is somewhat related to my earlier query about simultaneously correcting the capture time and geotagging photos.)

I would like to correct the capture times of my photos and give each updated file a name based on the newly-corrected capture time, so that (say) foo.jpg -> 20190719-195400-foo.jpg.

I tried

exiftool -alldates+=00:00:32 -d %Y%m%d-%H%M%S-%%f.%%e '-FileName<${DateTimeOriginal;ShiftTime($_,"+00:00:32")}' foo.jpg

but the created filename used the unmodified DateTimeOriginal. 

My actual test was

Code Select Expand

pi@pi4:~/ShiftTime $ exiftool -ver
11.16
pi@pi4:~/ShiftTime $ wget -q https://upload.wikimedia.org/wikipedia/en/4/48/Blank.JPG
pi@pi4:~/ShiftTime $ exiftool -alldates="2019:12:25 12:00:00+0:00" -gps:all= Blank.JPG
    1 image files updated
pi@pi4:~/ShiftTime $ exiftool -s -datetimeoriginal Blank.JPG
DateTimeOriginal                : 2019:12:25 12:00:00
pi@pi4:~/ShiftTime $ exiftool -alldates-=00:01:00 -d %Y%m%d-%H%M%S-%%f.%%e '-FileName<${DateTimeOriginal;ShiftTime($_,"-00:01:00")}' Blank.JPG
    1 image files created
pi@pi4:~/ShiftTime $ ls
20191225-120000-Blank.JPG  Blank.JPG  Blank.JPG_original
pi@pi4:~/ShiftTime $ exiftool -s -datetimeoriginal 20191225-120000-Blank.JPG
DateTimeOriginal                : 2019:12:25 11:59:00
pi@pi4:~/ShiftTime $
and I was hoping for a filename of 20191225-115900-Blank.JPG.

Yet I know the ShiftTime is being run because I got Warning: Not enough arguments for Image::ExifTool::ShiftTime for 'DateTimeOriginal' until I added the $_ after realising that my exiftool is version 11.16 and predates the new ShiftTime API described by the latest online documentation.

And the ShiftTime appears to do the right thing

Code Select Expand

pi@pi4:~/ShiftTime $ perl -e 'use Image::ExifTool; $_ = "2019:12:25 12:00:00"; Image::ExifTool::ShiftTime($_,"-00:01:00"); print'
2019:12:25 11:59:00

[Phil Harvey]

exiftool -alldates+=00:00:32 -d %Y%m%d-%H%M%S-%%f.%%e '-FileName<${DateTimeOriginal;ShiftTime($_,"+00:00:32")}' foo.jpg

The problem is that you are trying to shift the formatted version of the date (ie. after the -d option).  This should work (add a "#" to use the unformatted time):

exiftool -alldates+=00:00:32 -d %Y%m%d-%H%M%S-%%f.%%e '-FileName<${DateTimeOriginal#;ShiftTime("+00:00:32")}' foo.jpg

Note that I have also using the single-argument version of ShiftTime, which is the technique used in the application documentation.

- Phil