2.2.11.2 RTCP Profile Specific Extension for Packet Loss Notification

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The format of the RTCP profile specific extension for packet loss notification is as follows.


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Type

Length

Reserved 1

Reserved 2

Sequence Number

Type (2 bytes): The extension type. Set to 0x0004 (4).

Length (2 bytes): The extension length in bytes, including this header. Set to 0x0008 (8).

Reserved 1 (1 byte): Reserved for future extensions and MUST be set to zero (0). MUST be ignored by the receiver.

Reserved 2 (1 byte): Reserved for future extensions and SHOULD be set to zero (0). MUST be ignored by the receiver.

Sequence Number (2 bytes): This is the sequence number of the packet that is being reported as lost.

The frequency at which this request is sent SHOULD NOT be higher than once every 500 milliseconds.