A video processing apparatus includes a conversion unit and a transmission unit, and an external device includes a reception unit and a restoration unit. The conversion unit converts one or a plurality of elementary streams complying with ISO/IEC 14496-1:1999 into one data stream. The data stream includes a plurality of multiplexed packets, each multiplexed packet including both a Synchronization Layer (SL) packet and an elementary stream identifier of the SL packet. The transmission unit transmits the data stream to the external device using an isochronous or bulk transfer. The reception unit receives, from the external device, the data stream that is transmitted using the isochronous or bulk transfer. The restoration unit restores the data stream to one or a plurality of elementary streams complying with ISO/IEC 14496-1:1999.