5. The video editing system of claim 4 , wherein the processor is further configured to convert the story into a sequence including a video track and a plurality of audio tracks of different types, wherein each clip in each segment is transformed into a span on a track.
10. The video editing system of claim 5 , wherein spans on video tracks are automatically created using video corresponding to an audio clip when the video track is empty in a region corresponding to a span on the audio track for the audio clip.