libexif
DESCRIPTION
libexif is a library for parsing, editing, and saving EXIF data. It is intended to replace lots of redundant implementations in command-line utilities and programs with GUIs.
FEATURES
libexif supports parsing, editing and saving of EXIF data. In addition, it has gettext support. All EXIF tags described in EXIF standard 2.1 are supported.
REQUIREMENTS
libexif is written in plain C and does not require any additional library.
LIMITATIONS
libexif can only handle some maker notes, and even those not very well. More work needs to be done. Note that libmnote has been merged with libexif - it is no longer needed.
USAGE
Until someone writes some documentation, you need to refer to the header files. The short test-program test/test-mem illustrates how to create valid EXIF data from scratch, how to save EXIF data and how to load EXIF data from data in memory. Don't hesitate to contact us (<libexif-devel@lists.sourceforge.net>) if you've got any questions on how to use libexif.
FRONTENDS
Right now, I know of the following frontends to libexif:
- exif: A small command-line utility to show EXIF information in JPEG
- gexif: A GTK+ frontend for editing EXIF data
- gphoto2: A command-line frontend to libgphoto2, a library to access a
wide range of digital cameras (http://www.gphoto.org).
- gtkam: A GTK+ frontend to libgphoto2 (http://www.topfrose.de).
- thirdeye: Digital photos organizer and driver for eComStation
- digicam: If you would like to migrate your program to use libexif or add EXIF support to it, don't hesitate to contact the authors.
LIBRARIES
I know of the following libraries that use or have been inspired by libexif:
- pel: PHP-Code (http://pel.sourceforge.net)
AUTHORS
libexif has originally been written by Curtis Galloway <curtisg@users.sourceforge.net>. Because of the original design not supporting editing and saving, Lutz Müller <lutz@users.sourceforge.net> rewrote libexif from scratch.
LINKS
Some links you might want to check out if you are interested in further information about EXIF.
- http://drewnoakes.com/code/exif: metadata extraction framework in Java
- http://www.pima.net: This is where I got the exif standard from. Site is down as of 2002/12/31.
- http://www.jeida.or.jp: Can't remember any more. Site is down as of 2002/12/31.
- http://www.exif.org: information about the EXIF standard.
- http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/index.html: Looks like libexif in Perl. Seems to support a lot of MakerNotes.