RTCSessionDescription: sdp property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

The property RTCSessionDescription.sdp is a read-only string containing the SDP which describes the session.

Value

The value is a string containing an SDP message like this one:

v=0
o=alice 2890844526 2890844526 IN IP4 host.anywhere.com
s=
c=IN IP4 host.anywhere.com
t=0 0
m=audio 49170 RTP/AVP 0
a=rtpmap:0 PCMU/8000
m=video 51372 RTP/AVP 31
a=rtpmap:31 H261/90000
m=video 53000 RTP/AVP 32
a=rtpmap:32 MPV/90000

Example

js
// The remote description has been set previously on pc, an RTCPeerConnection

alert(pc.remoteDescription.sdp);

Specifications

Specification
WebRTC: Real-Time Communication in Browsers
# dom-rtcsessiondescription-sdp

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
sdp

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

See also

  • WebRTC
  • The standard for using SDP in an offer/answer protocol RFC 3264.