1. A computer system for inputting information on scenes that are portions of a motion image, said motion image consisting of a linear sequence of frames and scenes, each said scene being a continuous sequence of said frames, comprising: (a) means for storing motion image data, (b) input means, (c) display means having a display surface, (d) database means, (e) means for detecting scene changes in motion image data extracted from said means (a), (f) means for generating scene information according to the detected scene changes and storing said scene information in a scene information file, (g) means for causing graphical display of scene information on the display surface of said display means, (h) means for executing an edit command input by a user operating said input means to edit said scene information file, at least some of said edits serving to apply to said scenes in said information file attributes of semantic scene contents, each said attribute applying to a continuous sequence of one or more said scenes, and (i) means for generating a command executable by said database means for registering scene information in said scene information file, and sending the generated command to said database means.