Hi,
I wrote a simple perl script to change size, add frame and author on a photo.
I use AutoOrient() to rotate it if needed but the exif tag is not updated.
For now I use jhead to make a new exif header but is it possible to put the correct value for orientation with perlmagic?
(On Freebsd I used jpegtran, now I want use a MacOS computer and don't install a lot of software!)