If your camera clock was reset sometime in the past and the pictures have wrong timestamp written in the EXIF metadata, here's what you can do:
1. Put all the pictures with the wrong time in one folder, like Desktop/Pics
2. Check the time and the date the camera is showing, e.g. 13.1.2009 01:31, and the current time, e.g. 23.12.2009 10:21
3. Now subtract both times:
23.12.2009 10:21
- 13.01.2009 01:31
-------------------
10.11.0000 08:50
So the difference is 0 years, 11 months, 10 days, 8 hours and 50 minutes.
3. Change the creation dates using exiftool:
> exiftool "-AllDates+=0:11:10 08:05:00" Desktop/Pics
4. If you want to change the file modified and accessed timecode, you can use the following command in cygwin shell:
$ for i in *.JPG ;do exiftool.exe -S -d "%Y%m%d%H%M.%S" -CreateDate $i |awk '{print $2}' |xargs -I % touch -t % $i ;done
This command might take quite some time and may slow down your computer. For my set of 60 pictures it took about 5 minutes. You've been warned.
5. Sadly I couldn't figure out how to change file creation timecode in batch mode.
References:
- http://www.sno.phy.queensu.ca/~phil/exiftool/
- http://www.sno.phy.queensu.ca/~phil/exiftool/exiftool_pod.html
- http://www.perlmonks.org/?node_id=767176
Wednesday, December 23, 2009
Subscribe to:
Posts (Atom)