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.

Syntax

js
const value = sessionDescription.sdp
sessionDescription.sdp = value

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

BCD tables only load in the browser

See also

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