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Re: [webrtc-pc] The language around setting a description appears to prohibit renegotiation of RIDs (#2724)

From: Jan-Ivar Bruaroey via GitHub <sysbot+gh@w3.org>
Date: Wed, 26 Oct 2022 22:35:36 +0000
To: public-webrtc-logs@w3.org
Message-ID: <issue_comment.created-1292737417-1666823734-sysbot+gh@w3.org>
So with https://github.com/w3c/webrtc-pc/pull/2758/ merged, the current language here is: _"if none of the encodings in transceiver.[[Sender]].[[SendEncodings]] contain a rid member whose value matches any of the rids in the simulcast attribute, then fail the process of applying description."_

A decent reduction in cases where sRD can fail, but one remains.

According to @docfaraday offline, there are very few situations where an sRD(offer) should error out due to an inconsistency with something previously negotiated (things like removal of m-sections). 

He suggested sRD not fail here, and that the answer simply won't be simulcast. This seemed so simple, I said I'd do a PR and a slide for the November interim.

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