animated_gif_detector

AnimatedGifDetector

A simple utility to determine if a GIF is animated, and how many frames it contains. Only 2 frames are needed to determine if the GIF is "animated", so the user has the option to specify an option to return immediately or keep counting frames. Designed for use on a stream to avoid unnecessary memory usage.

Installation

Add this line to your application's Gemfile:

gem 'animated_gif_detector'

And then execute:

$ bundle

Or install it yourself as:

$ gem install animated_gif_detector

Usage

One-liner:

AnimatedGifDetector.new(File.open('your_image.gif', 'rb')).animated?

Customizable:

io = File.open('your_image.gif', 'rb')
detector = AnimatedGifDetector.new(io, terminate_after: false)
detector.animated? # true
detector.frames # 3

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/bfolkens/animated_gif_detector.