Section 9.7: RTCRtpCodecParameters

[aboba]

Currently, we have:

partial dictionary RTCRtpCodecParameters {
DOMString name = "";
unsigned short payloadType;
sequence headerExtensionURIs;
};

What does this mean for an RTCRtpReceiver? If a headerExtensionURI is not specified for a given payloadType, does this mean that the header extension will be ignored if it is included in an RTP packet with that Payload Type? Probably not.

Also, what does it mean for an RTCRtpSender? If the headerExtensionURI is not specified for a given Codec name and payloadType, does it mean that the header extension is never sent in an RTP packet with that Payload Type?

[aboba]

The argument here is that a RTCRtpSender object will only have one codec, and therefore that the headerextensions need only be configured globally. On the receiver the header extensions will also be global. So the proposed resolution is to remove the sequence of headerExtensionURIs from RTCRtpCodecParameters.