Presented herein are method(s) and apparatus for demultiplexing, merging, and duplicating packetized elementary stream/program stream/elementary stream data. In one embodiment, there is presented a method for processing data. The method comprises receiving a bitstream wherein said bitstream comprises a plurality of streams; mapping the plurality of streams to a plurality of identifiers; packetizing the plurality of streams, thereby resulting in a plurality of packets, and wherein each packet further comprises: a portion of only one of the plurality of streams; and a particular one of the identifiers, wherein the particular one of the identifiers is mapped to the only one of the plurality of streams.