1. A method of selecting a group of frames from a video sequence, comprising: accessing a video sequence from a collection of media assets stored in a memory; using a data processor to automatically analyze the video sequence to compute motion characteristics of the video frames; classifying the video frames according to the computed motion characteristics; for each group of classified video frames, computing a quality measure for the video frames and an overall quality value for the video frames; storing the group of classified video frames for each motion class in a memory.