1. A moving image generation system comprising: a CPU and memory storing programs which when executed by the CPU cause the CPU to perform functions including: receiving a determination of whether a designated subject is present in each of a plurality of photographed frame images in moving images, image data of the moving images being acquired by performing photography with a plurality of image capture devices that are disposed such that respective photographing areas of the plurality of image capture devices are differentiated from each other; at certain timings, while the photography is performed, executing selective clipping processing that clips a subject-included image area from image data of at least one of the photographed frame images that includes the subject-included image area, wherein the subject-included image area is a partial image area, of the at least one of the photographed frame images, in which the subject is detected and included at a predetermined position and in a predetermined size in which all of the subject is provided and a predetermined margin can be provided around the subject; and coupling a plurality of selectively clipped subject-included image areas in order of photographing time according to the certain timings in the photography so as to generate a single moving image.