[dgaies]

I guess I was a little too anxious to open up and start using my K7 last month that I must have forgotton to enter the date/time when I first turned it on. I didn't notice it until this morning (a month later) and now I have a ton of files with the incorrect date info stored in the EXIF.

Does anyone know of a piece of software (or other method) that would go back and correct this? All of the dates are offset by the exact same amount of time so it would just be a matter of adding that amount of time on to what is already in the EXIF data. If all else fails I may just resort to trying to writing a program myself, but I have to believe I am not he first person to make this mistake and want to correct it so I was hoping something was already out there.

Thanks.

[RBellavance]

ExifTool (ExifTool by Phil Harvey) has the capability to do what you want:

-TAG[+-]=[VALUE]
Write a new value for the specified tag (ie. "-comment=wow"), or
delete the tag if no VALUE is given (ie. "-comment="). "+=" and
"-=" are used to add or remove existing entries from a list, or to
shift date/time values (see Image::ExifTool::Shift.pl for
details), and "-=" may be used to conditionally remove or replace
a tag (see "WRITING EXAMPLES" for examples).

And from the examples section of the documentation:

exiftool -DateTimeOriginal-=’0:0:0 1:30:0’ dir
Adjust original date/time of all images in directory "dir" by sub-
tracting one hour and 30 minutes. (This is equivalent to "-Date-
TimeOriginal-=1.5". See Image::ExifTool::Shift.pl for details.)

exiftool -createdate+=3 -modifydate+=3 a.jpg b.jpg
Add 3 hours to the CreateDate and ModifyDate timestamps of two
images.

exiftool -AllDates+=1:30 -if ’$make eq "Canon"’ dir
Shift the values of DateTimeOriginal, CreateDate and ModifyDate
forward by 1 hour and 30 minutes for all Canon images in a direc-
tory. (The AllDates tag is provided as a shortcut for these three
tags, allowing them to be accessed via a single tag.)

So something like

Code:

exiftool -AllDates+=hh:mm *.jpg

should do the trick

[Marc Sabatella]

As does any decent image management program - Lightroom, ACDSee, Aperture, etc.

I'm moving this thread to the PP / Software forum as it is more appropriate there.

[mattdm]

Jhead (Exif Jpeg header manipulation tool) also does this, and has some convenience options that make it particularly well-suited for fixing problems like this. The "-da" flag is my favorite for big batch corrections. Take a picture of a clock (with a second hand or counter) with the date still wrong, and then later look at that image's exif vs. the pictured time/date, and use -da with those two times.

[dgaies]

Thanks everyone! I will give it a try this afternoon.