The codec of Dxtory can record original pixel data as it is. A quality can be pursued to a limit with video source without degradation. Moreover, since the third party VFW codec is also supported, the user can choose a favorite solution. The bottleneck of No. 1 of the speed of capture is a write-in speed to HDD. If it is the environment of two or more HDD, this function will accelerate writing speed. Preparation is completed only by specifying two or more holders which save data, and performing speed setting, without using a special file system. If there are two or more audio input devices, two sound sources are recordable, like game sound and mic input.