… "cn", "telephone-event", "rtx" or a forward error correction codec ("ulpfec" [ RFC5109 or "flexfec" [ FLEXFEC ]), reject with a newly created InvalidAccessError If the scaleResolutionDownBy parameter in the parameters argument has a value less than 1.0, return a promise rejected…

…DOMString> fecMechanisms Supported FEC mechanisms; valid values include "xor" [[RFC5109]] and "raptor" [[RFC6681]]. dictionary RTCRtcpFeedback RTCRtcpFeedback provides information on RTCP feedback messages. DOMString type Valid values for type are the "RTCP Feedback" Attribute Va…

…OMString> fecMechanisms Supported FEC mechanisms; valid values include "xor" [[!RFC5109]] and "raptor" [[!RFC6681]]. dictionary RTCRtpFeedback DOMString type Valid values for type are the "RTCP Feedback" Attribute Values enumerated in [[!IANA-SDP-14]] ("ack", "ccm", "nack", etc.)…