EXIF/IPTC metadata manipulation tool Exiv2 can: * print the Exif metadata of JPEG, TIFF and several RAW image formats as summary info, interpreted values, or the plain data for each tag * print the IPTC metadata of JPEG images * print, set and delete 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, insert and delete Exif metadata, IPTC metadata and JPEG comments * extract, insert and delete the thumbnail image embedded in the Exif metadata * fix the Exif ISO setting of picture taken with Nikon cameras