Real-time Transport Control Protocol (RTCP) Overview

 

The RTP protocol is augmented with a control protocol RTCP to monitor the quality of service and to convey information about the participants in an on-going session.

The RTCP messages are not always present in the Wireshark captures.

 

The column RTCP Type gives the different types:

●	SR	Sender Report
●	RR	Receiver Report
●	SDES	Source Description
●	BYE	Goodbye
●	APP	Application-defined
●	RTPFB	Generic RTP Feedback
●	PSFB	Payload-specific Feedback
●	XR	RTCP Extension
●	RSI	Receiver Summary Information

 

Between the brackets [ ] the number of occurrences of the specific RTCP type is displayed :

 

Selecting the link displays the full list of the RTCP messages and the contents :

 

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