An image pickup position information acquisition unit acquires, from a position fixing unit, position information of an image pickup location of a moving image being picked up. A preceding image pickup position information storage unit stores position information of a preceding image pickup location as preceding image pickup position information. A change point detector compares the image pickup position information and the preceding image pickup position information. If the position indicated by the image pickup position information is spaced apart from the position indicated by the preceding image pickup position information by a predetermined distance, the change point detector detects the current position as a change point. The change point is recorded onto a change point position information. Thumbnail data generated by a thumbnail generator is recorded as a change point thumbnail.