To form the file of still pictures and sounds as a single file, while observing the general form of moving pictures, so that even a reproducer having neither specific form nor exclusive function can reproduce the still pictures and sounds at once.

A recorder 1 having a moving picture encoder 4, a sound encoder 5 and a multiplexer 7 comprises a data processor 6 between the moving picture encoder 4 and the multiplexer 7. The data processor 6 adds and outputs information for continuing the reproduction of the still pictures for a specified time in a moving picture reproducer 11 to still picture data coded by the moving picture encoder 4, in a form meeting the moving picture coding system of the moving picture encoder 4.