Skip to content


Subversion checkout URL

You can clone with
Download ZIP
A simple wrapper around exiv2
Ruby C++
Branch: master


latest commit b3f2b1c1db
@joneslee85 joneslee85 authored
Failed to load latest commit information.
ext/exiv2 Removed unnecessary extern "C"
lib Version bump, 0.0.7 accidentally 1.8 support.
spec Modify specs to support ruby 1.8 and test for encoding in each for 1.9+
.gitignore Add bin to .gitignore
.rspec Output rspec in colour
.travis.yml Test against 2.0 and 2.1 series
Gemfile Use bundled environment in specs
Gemfile.lock The library is meant to be 1.8/1.9 compatible, don't lock down the
Rakefile Allow to specify the exiv2 include dir when compiling via EXIV2_DIR e…
exiv2.gemspec Readme and license.


Build Status

A simple wrapper around the C++ Exiv2 libary for reading and writing image metadata.


Requires that the exiv2 C++ library is installed.


gem install exiv2

if you get errors with header could not be found below:

exiv2.cpp:1:10: fatal error: 'exiv2/image.hpp' file not found
#include "exiv2/image.hpp"

please explicitly declare the header path

gem install exiv2 -- --with-exiv2-include="${EXIV2_PREFIX}/include" --with-exiv2-lib="${EXIV2_PREFIX}/lib"

on OSX with Homebrew's exiv2, the EXIV2_PREFIX can be set:

export EXIV2_PREFIX=$(brew --prefix exiv2)

If you are on new version of Command Line Tool (that is newer than 6.2, and bump into following error:

/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/iterator:341:10: fatal error: '__debug' file not found
#include <__debug>

You can follow the quick hack by touching a new file /Library/Developer/CommandLineTools/usr/include/c++/v1/__debug with content:

#define _LIBCPP_ASSERT(...) ((void)0)

Once everything is successfully installed, you can give it a go:

require 'exiv2'
image ="image.jpg")
image.iptc_data.each do |key, value|
  puts "#{key} = #{value}\n"
image.exif_data.each { ... }
image.xmp_data.each { ... }

iptc_data_hash  = image.iptc_data.to_hash
xmp_data_hash   = image.xmp_data.to_hash


image.iptc_data["Iptc.Application2.Caption"] = "A New Caption"
image.iptc_data.add("Iptc.Application2.Keywords", "fishy")



None of the existing Ruby libraries for reading and writing image metadata did quite what we wanted, so we figured it wouldn't be too hard to wrap enough of Exiv2 to meet our needs.

The intention is to just mirror the Exiv2 API in Ruby, so the path to extending this to support more of Exiv2's functionality should be straightforward. Patches are welcome.


Tested on 1.9.3, 2.0.x and 2.1.x with Exiv2 0.24


  • Fork the project.
  • Make your feature addition or bug fix.
  • Add tests for it. This is important so I don't break it in a future version unintentionally.
  • Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)
  • Send me a pull request. Bonus points for topic branches.


In early development. Very little of Exiv2's API is supported, and it hasn't been heavily tested.


Pete Yandell, Mark Turnley, Lucas Parry, Norbert Wojtwoicz, Jan Graichen, John Barton


Copyright (c) 2014 Envato & Pete Yandell. See LICENSE for details.

Something went wrong with that request. Please try again.