1. A non-transitory computer readable medium, comprising an information processing program recorded therein which is to be executed on a computer in which a processing for a moving image and a processing for a sound to be synchronously replayed with the moving image are executed, wherein the information processing program causes the computer to execute as a plurality of mechanisms of: a still image extraction mechanism which extracts a plurality of still images from the moving image; a sound detection mechanism which detects a voiced sound section in which a voice sound is included in the sound to be synchronously replayed in a play-section of the moving image; a moving image editing point setting mechanism which sets a point of time included in the play-section of the moving image as a moving image editing point; a moving image editing point determination mechanism which determines whether or not the moving image editing point set by the moving image editing point setting mechanism is included in the voiced sound section detected by the sound detection mechanism; a sound editing point setting mechanism which sets a sound editing point based on a start point of time of a voiced sound section including the moving image editing point among the voiced sound sections detected by the sound detection mechanism under a condition that the moving image editing point determination mechanism determines that the moving image editing point is included in the voiced sound section; a text extraction mechanism which converts the voice sound to be replayed after the sound editing point set by the sound editing point setting mechanism into a text and extracts the converted text; a still image selection mechanism which selects a still image outputted at the moving image editing point set by the moving image editing point setting mechanism among the plurality of still images extracted by the still image extraction mechanism; and a combination mechanism which combines the text extracted by the text extraction mechanism into the still image selected by the still image selection mechanism.