Patent ID: 8462946

Claim:
An apparatus for recording a file comprising a related media data container and a metadata container, the apparatus comprising: a receiver arranged to receive first streamed Real-Time Transport Protocol (RTP) packets comprising packetized first media data samples based on a first clock, to receive second streamed RTP packets comprising second media data samples based on a second clock different from the first clock, wherein the second media data samples are associated to the first media data samples, to receive first Real-Time Transport Control Protocol (RTCP) packets related to the first streamed RTP packets and comprising information for indicating a relationship of the first clock to a reference clock, and to receive second RTCP packets related to the second streamed RTP packets and comprising information for indicating a relationship of the second clock to the reference clock; and a recorder arranged to store the received first and second streamed RTP packets and at least RTCP sender reports of the received first and second RTCP packets in the media data container, and to store associated metadata in the metadata container, the associated metadata comprising reception time and/or transport protocol timestamp information of the received first and second streamed RTP packets and the received first and second RTCP packets and location information indicating a location of the stored first and second RTP packets and the stored first and second RTCP packets in the media data container; wherein at least one of the receiver and the recorder is hardware or a combination of hardware and software.