Main Page | See live article | Alphabetical index In animation, a key frame is a frame in an animated sequence of frames that was drawn or otherwise constructed directly by the user rather than generated automatically, e.g. by tweening. In video compression, a key frame or I frame is a frame encoded without reference to any images in another frame. In non-linear digital video editing, a key frame is a frame used to indicate the beginning or end of a change made to the signal. For instance, a key frame could be set to indicate the point at which audio will have faded up or down to a certain level. This article (or an earlier version of it) contains material from FOLDOC, used with permission. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.