Abstract: In a digital media system, a method of mapping digital media data in a first format onto a transport format, the method comprising: obtaining digital media data encoded in the first format; arranging the obtained digital media data in a frame arrangement, the frame arrangement of digital media data having a size and comprising a digital media data chunk and a metadata chunk, the frame arrangement operable to allow a digital video disk decoder to access and decode the digital media data chunk; and inserting the frame arrangement of digital media data in a digital media data stream in the transport format.