Re: [webrtc-stats] Confusing round trip time defintion in remote-outbound-rtp (#659)

DLRR is a block type of XRs and can't be part of a SR (I think... the structure is too different). It can come together with a SR as part of a compound packet which may explain the confusion.

The correct thing should be
> Estimated round trip time for this [SSRC](https://www.w3.org/TR/webrtc-stats/#dfn-ssrc) based on the latest RTCP **Extended Report (XR)** that contains a DLRR report block as defined in [[RFC3611](https://www.w3.org/TR/webrtc-stats/#bib-rfc3611)]. The Calculation of the round trip time is defined in section 4.5. of [[RFC3611](https://www.w3.org/TR/webrtc-stats/#bib-rfc3611)]. If the latest **XR** does not contain the DLRR report block, or if the last RR timestamp in the DLRR report block is zero, or if the delay since last RR value in the DLRR report block is zero, the round trip time is left undefined.

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Received on Monday, 29 August 2022 17:29:52 UTC