This invention allows recording of moving images with a large number of pixels and high frame rate while suppressing the circuit scale and power consumption. A first processing circuit encodes a frame acquired from an image capturing device, records the resultant encoded data in a recording medium at a recording position received from a second processing circuit, and transmits a relevant data amount to the second processing circuit. The second processing circuit encodes a frame obtained from the image capturing device, records the resultant encoded data in the recording medium at a recording position determined in prior recording processing, determines a recording position for the first processing circuit, and transmits the determined recording position to the first processing circuit. Upon receiving information showing a data amount, the second processing circuit updates a recording position based on the received data amount.