library and program to read and write meta information in multimedia files

 Image::ExifTool is a Perl module with an included command-line application
 called exiftool for reading and writing meta information in a wide variety of
 files, including the maker note information of many digital cameras by
 various manufacturers such as Canon, Casio, FLIR, FujiFilm, GE, HP,
 JVC/Victor, Kodak, Leaf, Minolta/Konica-Minolta, Nikon, Nintendo,
 Olympus/Epson, Panasonic/Leica, Pentax/Asahi, Phase One, Reconyx, Ricoh,
 Samsung, Sanyo, Sigma/Foveon and Sony.