Calculated Variables, e.g subtract two dates?

[ccclapp]

Hi

I am a new user, but have read the entire wiki help file :-) but am unclear on a few things, including:

I would like to populate a metadata field with the time difference between two dates, specifically a person's current age minus the time between current date and image capture date.  The intent is to automate my "Caption" field with the age the person was on the date of the image. e.g. "John when he was ({CurrentAge} minus ({CurrentDate} minus {CaptureDate}))" = age of subject on capture date.

Can math be performed on variables?

Thanks very much!

[Kirk Baker]

I am a new user, but have read the entire wiki help file :-) but am unclear on a few things, including:

I would like to populate a metadata field with the time difference between two dates, specifically a person's current age minus the time between current date and image capture date.  The intent is to automate my "Caption" field with the age the person was on the date of the image. e.g. "John when he was ({CurrentAge} minus ({CurrentDate} minus {CaptureDate}))" = age of subject on capture date.

Can math be performed on variables?

No, math cannot be done on variables.

-Kirk

[ccclapp]

Thanks I will look into ExifTool for this.