A GIF file is a bitmap that supports 256-color lossless compression graphics. An animated GIF is, in fact, not a video file, but an image, or rather, a sequence of static images. Contrary to popular belief, GIF files do not have to be animated; they can be regular static images. However, GIF gained the most popular mostly because of its support for animation. The GIF format also supports transparency - each pixel of an image can be in two states: transparent or opaque, translucency is not supported.