I have this Rails app with a folder to load images - but how can I check if an image is an animated GIF using RMagick?
You can count scenes associated with the image. The Rmagick means to do something like this:
scenes
Rmagick
image = Magick::ImageList.new(image_file) if image.scene == 0 #this is not an animated gif else #this is an animated gif end