 This is usually the case with attempting to show DSLR images on a PSP.MPEG-4 and AVC video formats are also compatible with PSP.With reasonable video and audio bit-rate settings (a resolution of 320×240, a video bit rate of 500 Kbit per second, and an audio sampling rate of 22050 Hz) a 22-minute video file is roughly 55 MB, enough to fit on a Memory Stick Duo as small as a 64 MB.