2.2.11.9 RTCP Profile Specific Extension for Packet Train Packet
The format of the RTCP profile specific extension for packet train packet is as follows: <31>
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Type |
Length |
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SSRC |
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L |
Packet Idx |
R |
Packet Count |
Packet Train Byte Count |
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Type (2 bytes): The extension type. Set to 0x000B (11).
Length (2 bytes): The extension length in bytes, including this header. Set to 0x000C (12).
SSRC (4 bytes): The SSRC from which the packet train packet is sent.
L (1 bit): The last packet train packet flag. This field MUST be set to 1 if the packet is the last packet train packet in the packet train. It MUST be set to 0 otherwise.
Packet Idx (7 bits): The index of the packet train packet in the packet train. It starts from 0.
R (1 bit): Reserved. The sender SHOULD set it to 0. The receiver MUST ignore it.
Packet Count (7 bits): The total number of packet train packets in the packet train.
Packet Train Byte Count (2 bytes): The accumulated number of bytes in the RTCP RR packets containing the packet train packet counting from the first packet train packet to this packet train packet.