@11ways/exiv2node

👷🏼 Eleven Ways' exiv2node library

_{Coded with ❤️ by Eleven Ways.}

Exiv2

Exiv2 is a native C++ extension for node.js that provides support for reading and writing image metadata via the Exiv2 library.

It was created by Damian Beresford

Dependencies

To build this addon you'll need the Exiv2 library and headers so if you're using a package manager you might need to install an additional "-dev" packages.

Debian

apt-get install exiv2 libexiv2-dev

OS X

You'll also need to install pkg-config to help locate the library and headers.

MacPorts:

port install pkgconfig exiv2

Homebrew:

brew install pkg-config exiv2

FreeBSD

pkg install pkgconf exiv2

Windows

Install pkg-config using Chocolatey:

choco install pkgconfiglite

Download latest msvc64 exiv2 build from the Exiv2 download page and extract to a folder of your choice.

Add a system variable named PKG_CONFIG_PATH and set it's value to EXIV2ROOTDIR\lib\pkgconfig replacing EXIV2ROOTDIR with the path where you extracted exiv2 from the step before (e.g. D:\src\exiv2msvs\lib\pkgconfig).

You'll also need windows-build-tools to compile this package.

For Electron apps, you'll want to copy exiv2.dll to the root directory of your Electron Windows build. You can automated this using the extraFiles option.

Other systems

See the Exiv2 download page for more information.

Installation Instructions

Once the dependencies are in place, you can build and install the module using npm:

npm install exiv2

You can verify that everything is installed and operating correctly by running the tests:

npm test

Sample Usage

Read tags:

var ex = require('exiv2');

ex.getImageTags('./photo.jpg', function(err, tags) {
  console.log("DateTime: " + tags["Exif.Image.DateTime"]);
  console.log("DateTimeOriginal: " + tags["Exif.Photo.DateTimeOriginal"]);
});

var fs = require('fs');

ex.getImageTags(fs.readFileSync('./photo.jpg'), function(err, tags) {
  console.log("DateTime: " + tags["Exif.Image.DateTime"]);
  console.log("DateTimeOriginal: " + tags["Exif.Photo.DateTimeOriginal"]);
});

Load preview images:

var ex = require('exiv2')
  , fs = require('fs');

ex.getImagePreviews('./photo.jpg', function(err, previews) {
  // Display information about the previews.
  console.log(previews);

  // Or you can save them--though you'll probably want to check the MIME
  // type before picking an extension.
  fs.writeFile('preview.jpg', previews[0].data);
});

Write tags:

var ex = require('exiv2')

var newTags = {
  "Exif.Photo.UserComment" : "Some Comment..",
  "Exif.Canon.OwnerName" : "My Camera"
};
ex.setImageTags('./photo.jpg', newTags, function(err){
  if (err) {
    console.error(err);
  } else {
    console.log("setImageTags complete..");
  }
});

Delete tags:

var ex = require('exiv2')

var tagsToDelete = ["Exif.Photo.UserComment", "Exif.Canon.OwnerName"];
ex.deleteImageTags('./photo.jpg', tagsToDelete, function(err){
  if (err) {
    console.error(err);
  } else {
    console.log("deleteImageTags complete..");
  }
});

Take a look at the examples/ and test/ directories for more.

Authors

Damian Beresford - Original creator
Jelle De Loecker - Follow me on Github (@skerit) and on Twitter (🐦@skeriten)

See also the list of contributors who participated in this project.

@11ways/exiv2node is developed at Eleven Ways, a team of IAAP Certified Accessibility Specialists.

License

This project is licensed under the MIT License - see the LICENSE file for details.

weijentu/exiv2node