I have a folder with hundreds of GIF images. Some are static, and others are dynamic. How can I separate the static GIFs from the dynamic ones?
You can use a free tool called ImageMagick. It can tell you how many images are in the GIF.
identify -format %n~%f\n *.gif
1~120406-00.gif 1~120406-01.gif 1~autonumbering.gif
%n number of images in current image sequence
%f filename (including suffix)
The 1 is front indicates how many frames are in the image.
Anything more than 1 we can assume is an animated GIF.