A multiplex scheme conversion apparatus (103) includes (i) a packet loss judgment unit (202) that judges the packet loss of a TS packet, performs error processing in the case where a packet loss is detected, and outputs the payload data on which error processing has already been performed and (ii) a Box making unit (206) that makes `moov` including error information and `mdat` based on inputted AU data and the display time in a PES header.
