How do I batch change the date taken information in EXIF data?

"jhead is capable of doing this.

Let's say you know a certain picture was taken on 2017-04-19 16:20 but the current date is showing as 2007-09-01 00:15, you can adjust all jpg pictures in a folder to the correct time by doing:

jhead -da2017:04:19/16:20-2007:09:01/00:15 *.jpg

Here is an extract from the manual:

DATE / TIME MANIPULATION:
-ft Set file modification time to Exif time
-dsft Set Exif time to file modification time
-n[format-string]
Rename files according to date. Uses exif date if present, file
date otherwise. If the optional format-string is not supplied,
the format is mmdd-hhmmss. If a format-string is given, it is
is passed to the 'strftime' function for formatting
In addition to strftime format codes:
'%f' as part of the string will include the original file name
'%i' will include a sequence number, starting from 1. You can
You can specify '%03i' for example to get leading zeros.
This feature is useful for ordering files from multiple digicams to
sequence of taking. Only renames files whose names are mostly
numerical (as assigned by digicam)
The '.jpg' is automatically added to the end of the name. If the
destination name already exists, a letter or digit is added to
the end of the name to make it unique.
-nf[format-string]
Same as -n, but rename regardless of original name
-a (Windows only) Rename files with same name but different extension
Use together with -n to rename .AVI files from exif in .THM files
for example
-ta<+|->h[:mm[:ss]]
Adjust time by h:mm backwards or forwards. Useful when having
taken pictures with the wrong time set on the camera, such as when
traveling across time zones or DST changes. Dates can be adjusted
by offsetting by 24 hours or more. For large date adjustments,
use the -da option
-da<date>-<date>
Adjust date by large amounts. This is used to fix photos from
cameras where the date got set back to the default camera date
by accident or battery removal.
To deal with different months and years having different numbers of
days, a simple date-month-year offset would result in unexpected
results. Instead, the difference is specified as desired date
minus original date. Date is specified as yyyy:mm:dd or as date
and time in the format yyyy:mm:dd/hh:mm:ss
-ts<time> Set the Exif internal time to <time>. <time> is in the format
yyyy:mm:dd-hh:mm:ss
-ds<date> Set the Exif internal date. <date> is in the format YYYY:MM:DD
or YYYY:MM or YYYY

An even more powerful option is ExifTool."

"exiv2 is a command line tool to manipulate exif data. Supported image formats are JPEG, Canon CRW and Canon THM. PNG is read-only.

If you want to set the file date to the exif date you can use exiv2 with the following option.

-t Set the file timestamp according to the Exif create timestamp in
addition to renaming the file (overrides -k). This option is
only used with the ’rename’ action."

"I use a following script to give images some successive dates. Hope it helps. It expects a directory with the images to be redated as an argument i .e script directory_with_images

#!/bin/bash
HOUR=12
MINUTE=0
DATE=2004:06:20
for file in ""$1""/*;
do
exiv2 -v -M""set Exif.Image.DateTime $DATE $(printf %02d $HOUR):$(printf %02d $MINUTE):00"" ""$file""
exiv2 -v -M""set Exif.Photo.DateTimeDigitized $DATE $(printf %02d $HOUR):$(printf %02d $MINUTE):00"" ""$file""
exiv2 -v -M""set Exif.Photo.DateTimeOriginal $DATE $(printf %02d $HOUR):$(printf %02d $MINUTE):00"" ""$file""
#sets file timestamp (i.e. filesystem metadata, not image metadata) as well
exiv2 -v -T ""$file""
if [ $MINUTE = 59 ]; then
HOUR=$((HOUR + 1))
MINUTE=0
else
MINUTE=$((MINUTE + 1))
fi
# this would rename the file as well
#new_path=`pwd`/new_filename$(printf %02d $HOUR)$(printf %02d $MINUTE).jpg
#cp ""$file"" ""$new_path""
done"

iPhoto and Aperture both have a time-shift option, for when you're in a new time-zone usually, or the clock is wrong. It can either leave the files unedited (only updating the App's db) or edit the files. Clearly F-Spot needs to borrow this.

"Exiftool: slow on the command line. (It's written in Perl, so draw your own conclusions there.)

Exifer creates an empty tag or two in files, and not just in the EXIF block. It will also remove some tags written by other tools. As I haven't used it in over a year, I can't be specific as to which ones.

FastStone's stuff, imx, is too slow to keep installed for more than a day or two.

My vote is for Hr. Weinzerl's suggestion: Exiv2.

BZT"