Content edition/generation system

A content edition/generation system (1) for editing at least one source content to generate a multimedia content includes: a source content file (24) for managing a source content; a stage window (32) provided by an authoring function (21) arranging the source content; a time line window (33) having a plurality of tracks (33a) corresponding to the reproduction time of the multimedia content and provided by the authoring function (21) for allocating the tracks (33a) for each content arranged in the stage window (32) and managing the reproduction period including display of the source content in the multimedia content and the display end time; and a data manager function (22) for managing the position of the content arranged on the stage window (32) with respect to the stage window (32) and its size and the reproduction period with respect to the tracks (33a) as a view object (221) correlated to the content.