How to use "CreateDate" field to set the -Geotag log file name?

[mikesouza]

Hi.

Is it possible to extract CreateDate field from each file and use date parameters in specifying GPS log filename? For example, my GPS logs are in LOG-{YYYY}-{MM}-{DD}.GPX format (i.e., LOG-2013-06-01.GPX). I am processing a bunch of images and would like each image to use a GPS log from the date the image was created:

Code Select Expand


exiftool -Geotag LOG-%Y-%m-%d.gpx *.JPG


%y, %m, and %d should be taken from the image's CreateDate field.

Thanks.

[Phil Harvey]

I can't think of an easy way to do what you want, but instead you could just load all of the available track logs at once:

exiftool -geotag "LOG-*.gpx" *.JPG

- Phil

[mikesouza]

Thanks, Phil. That's what I do now but it really slows down the process if I have hundreds of images and large log files.

I wish there was a way to assign tag information to a variable (e.g., "$var<CreateDate[%Y%m%d]") and then use it as an option (e.g., "-geotag $var").

[Phil Harvey]

The problem is that the -geotag option loads all of the track logs before exiftool processes the first image file.  So what you are suggesting can not be easily implemented in the current scheme.

- Phil

[mikesouza]

Makes sense now. Maybe a slight tweak in future versions will allow for that

[mikesouza]

P.S. Is there a way to geotag images ONLY if GPS tags do not exist?

[Phil Harvey]

Yes:

exiftool -if 'not $gps:all' ...

(use double quotes instead of single if you are on Windows)

- Phil

[mikesouza]

Thanks again!