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[webrtc-pc] Handling of simulcast attributes with multiple choices in a version seems to be underspecified (#2769)

From: docfaraday via GitHub <sysbot+gh@w3.org>
Date: Thu, 08 Sep 2022 15:44:33 +0000
To: public-webrtc@w3.org
Message-ID: <issues.opened-1366590883-1662651869-sysbot+gh@w3.org>
docfaraday has just created a new issue for https://github.com/w3c/webrtc-pc:

== Handling of simulcast attributes with multiple choices in a version seems to be underspecified ==
ie; a=simulcast:recv 1,2,3;4,5,6;7,8,9

This is legal syntax, and its meaning is:

"I want you to send me three simulcast streams. For the first stream, you have a choice between rids 1, 2, and 3. For the second, you have a choice between 4, 5, and 6. For the third, you have a choice of 7, 8, and 9."

We obviously do not support this "multiple choices" semantics, so it is sensible to just pick the first choice whenever there are multiple, but I don't think we have written that down anywhere.

Please view or discuss this issue at https://github.com/w3c/webrtc-pc/issues/2769 using your GitHub account


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