transport_packet [MPEG-2 Semantics]
A transport packet is the basic form of data transmitted in a transport stream. The MPEG-2 specification states that transport packets are to be 188 bytes in length.
There are two basic forms of transport packets: packetized MPEG-2 private table sections and packetized elementary streams
Packet header
Each transport packet has a packet header of four bytes in length. Depending on settings in the packet header, the packet might also have an adaptation header, a packet payload, or both.
packetized private table sections
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