On changing this value in the metadata Lightroom now gives the correct time and photos can be logically sorted. In the IFD0 section, which covers basic camera information, is a field "ModifyDate". I then used ExifTool 10.33 to examine all the metadata held within a Canon HS230 Jpeg. Its date/time changes were reflected in Lightroom so I assumed there must be other metadata that Dopus is not touching. I have another application "EXIF Date Changer Pro" which simply adjusts all EXIF time values in all photos in a single directory by a set amount which I then tested. However on importing into Lightroom the old uncorrected date/time showed up. The four date/time values (Date created:, Date modified:, Date digitized: and Date taken) were all adjusted to the same (corrected) value. I used Dopus 11.19 to make the changes in the metadata pane for all files in the first photo directory. 8 hours because of time zone changes that had not been applied to her camera. All 800 odd photos from my wife's camera needed to be adjusted by approx.
I use Adobe Lightroom for most photo processing but prefer to bring timestamps into line before importing into Lightroom so that other photo viewing/editing applications still show correct local time. However (according to Phil Harvey), "The -globalTimeShift option is needed only when you want to copy a shifted date/time value to another tag.", such as a -geo tag.I have just been batch processing of holiday photos from 2 cameras which had different time bases. Note, an earlier revision of this post suggested using the -globalTimeShift parameter, as in: exiftool -globalTimeShift -24 -time:all *.jpg You can also try adding to the -out file specification ( after making backups! ), the option -overwrite_original OR -overwrite_original_in_place, inserted directly after the call to exiftool. The -out specification gets inserted directly after the call to exiftool. newJPG.jpg or (in a new directory), with -out. You can combine the above code with an -out file specification, like -out. The above code works to subtract 24 hours according to this Forum comment (by Phil Harvey):
Exiftool has an -alldates parameter: exiftool -alldates-=24 -filemodifydate-=24 -filecreatedate-=24 *.jpg
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