RTCRtpParameters Dictionary object
[Some information relates to pre-released product which may be substantially modified before it's commercially released. Microsoft makes no warranties, express or implied, with respect to the information provided here.]
Contains the RTP stack settings.
Syntax
dictionary RTCRtpParameters {
DOMString muxId = "";
sequence<RTCRtpCodecParameters> codecs;
sequence<RTCRtpHeaderExtensionParameters> headerExtensions;
sequence<RTCRtpEncodingParameters> encodings;
RTCRtcpParameters rtcp;
RTCDegradationPreference degradationPreference;
};
Standards information
Dictionary
| Membery | Type | Description |
|---|---|---|
| codecs | sequence<RTCRtpCodecParameters> | The codecs to send or receive (could include RED [RFC2198], RTX [RFC4588] and CN [RFC3389]). |
| degradationPreference | RTCDegradationPreference | Used to indicate the desired choice between degrading resolution and degrading framerate when bandwidth is constrained. Possible values: 'maintain-framerate', 'maintain-resolution', 'balanced'. |
| encodings | sequence<RTCRtpEncodingParameters> | The "encodings" or "layers" to be used for simulcast and Scalable Video Coding, both unsupported. |
| headerExtensions | sequence<RTCRtpHeaderExtensionParameters> | Configured header extensions. |
| muxId | DOMString, defaults to "" | The muxId assigned to the RTP stream, if any, empty string if unset. In an RTCRtpReceiver or RTCRtpSender object, this corresponds to MID RTP header extension defined in [BUNDLE]. This is a stable identifier that permits the track corresponding to an RTP stream to be identified, rather than relying on an SSRC. An SSRC is randomly generated and can change arbitrarily due to conflicts with other SSRCs, whereas the muxId has a value whose meaning can be defined in advance between RTP sender and receiver, assisting in RTP demultiplexing. Note that including muxId in RTCRtpParameters rather than in RTCRtpEncodingParameters implies that if it is desired to send simulcast streams with different muxId values for each stream, then multiple RTCRtpSender objects are needed. |
| rtcp | RTCRtcpParameters | Parameters to configure RTCP. |