ExifTool Forum

General => Metadata => Topic started by: ryan on May 04, 2011, 09:11:34 AM

Title: modifying exposure time
Post by: ryan on May 04, 2011, 09:11:34 AM
Hi there.
I would like to modify the exif exposure times in a set of images by a definable factor e.g. halving them, tripling them etc. Is this possible within the exiftool command line?
Thanks Ryan
Title: Re: modifying exposure time
Post by: Phil Harvey on May 05, 2011, 08:04:57 PM
Hi Ryan,

This may be done by creating a user-defined Composite tag based on ExposureTime, then copying the value of this new tag back to ExposureTime.  See the config file documentation for examples of how to create user-defined tags.

- Phil
Title: Re: modifying exposure time
Post by: ryan on May 18, 2011, 08:52:49 AM
Thanks Phil.
Ryan