ExifTool-10.23, Mac OS 10.11.5
Original file created 20th July 2016, 5:54:33 PM (reported in Photoshop)
Used the following command to add exif date metadata to a file that did not have exif metadata:
exiftool '-filemodifydate>datetimeoriginal' 'path/to/file/here.jpg'
The required info has been added to exif... However:
The date/time of the original is now 21st July 2016, 3:54:33 AM (reported in Photoshop)
Not sure why this has jumped forward in time?
You used the file modify date, that changes each time the file is changed. Run exiftool on the file to find out what datetime tag to use instead.
OK, thanks Hayo, I thought that I did have the right field!
A different file...
exiftool -a -G1 -s
[System] FileModifyDate : 2016:03:09 22:30:33+11:00
[System] FileAccessDate : 2016:07:20 17:23:55+10:00
[System] FileInodeChangeDate : 2016:03:21 09:23:13+11:00
If a file has no XMP, EXIF etc... then I can only imagine that the system date is the correct one to use, where am I going wrong?
Is my assumption wrong? If there is no other metadata, then there is no original/created date?
Would I need to look for something OS specific, such as on the Mac:
kMDItemFSCreationDate
exiftool -a -G1 -s -api MDItemTags
[System] MDItemContentCreationDate
Hi Stephen,
This looks to be a time zone problem since the two times reported by Photoshop are exactly 10 hours apart.
I would also recommend adding the -P option to preserve the original FileModifyDate when writing, but I don't think this is related to the difference that you are seeing in Photoshop.
For the files in your original post, what is the output of this command?:
exiftool -a -G1 -s -time:all 'path/to/file/here.jpg' 'path/to/file/here.jpg_original'
And yes, on a Mac the MDItemContentCreationDate may be what you should use. However, if the file hasn't been modified then FileModifyDate should work fine (and I think it was probably OK for your first file). Also note that MDItemContentCreationDate is only preserved when writing with ExifTool if -overwrite_original_in_place is used.
- Phil
Thank you Phil.
I did not keep a copy of the original files, they were just something quickly knocked up for testing. Of course, I can't reproduce the issue now! :]
Moving on...
exiftool -P -overwrite_original_in_place '-MDItemContentCreationDate>datetimeoriginal' 'FILE'
Before Exiftool:
[System] FileModifyDate : 2016:07:21 10:34:19+10:00
[System] FileAccessDate : 2016:07:21 10:39:20+10:00
[System] FileInodeChangeDate : 2016:07:21 10:34:20+10:00
[IFD0] ModifyDate : 2016:07:21 10:34:17
[XMP-xmp] CreateDate : 2016:07:21 10:23:16+10:00
[XMP-xmp] ModifyDate : 2016:07:21 10:34:17+10:00
[XMP-xmp] MetadataDate : 2016:07:21 10:34:17+10:00
After Exiftool:
[System] FileModifyDate : 2016:07:21 10:34:19+10:00
[System] FileAccessDate : 2016:07:21 10:42:02+10:00
[System] FileInodeChangeDate : 2016:07:21 10:41:50+10:00
[IFD0] ModifyDate : 2016:07:21 10:34:17
[ExifIFD] DateTimeOriginal : 2016:07:21 10:23:16
[XMP-xmp] CreateDate : 2016:07:21 10:23:16+10:00
[XMP-xmp] ModifyDate : 2016:07:21 10:34:17+10:00
[XMP-xmp] MetadataDate : 2016:07:21 10:34:17+10:00
Looking in Photoshop, Bridge or Apple Preview – the file creation date and the newly created exif date/time original are correct: 2016-07-21 10:23:16
So it appears that this is correctly working now, thanks!
Quote from: Phil Harvey on July 20, 2016, 07:20:30 AM
... And yes, on a Mac the MDItemContentCreationDate may be what you should use ...
- Phil
Hi Phil, if I was on Windows, what would be the options if there was no EXIF, XMP or other date/time metadata in the file? Unlike the Mac there is no OS specific extended metadata that I am aware of.
FileCreateDate is probably better from what Hayo was mentioning regarding
FileModifyDate...
Indeed, on Windows you can use fileCreateDate instead of the MDItem... tag.