EXIF/IPTC metadata manipulation tool
Exiv2 can:
* print the EXIF metadata of JPEG images as summary info, interpreted values,
or the plain data for each tag (here is a sample)
* print the IPTC metadata of JPEG images
* print the JPEG comment of JPEG images
* set, add and delete EXIF and IPTC metadata of JPEG images
* adjust the EXIF timestamp (that's how it all started...)
* rename EXIF image files according to the EXIF timestamp
* extract EXIF metadata, IPTC metadata and JPEG comments from image files and
insert it again
* extract the thumbnail image embedded in the EXIF metadata
* delete the thumbnail or the complete EXIF metadata from an image
