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The getContributingSources() method of the RTCRtpReceiver interface returns an array of RTCRtpContributingSource instances, each corresponding to one CSRC (contributing source) identifier received by the current RTCRtpReceiver in the last ten seconds.


var rtcRtpContributingSources = rtcRtpReceiver.getContributingSources()



Return value

An array of RTCRtpContributingSource instances. Each instance describes one of the contributing sources that provided data to the incoming stream in the past ten seconds.


Specification Status Comment
WebRTC 1.0: Real-time Communication Between Browsers
The definition of 'getContributingSources()' in that specification.
Candidate Recommendation Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support59 ?59 ? No ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support5959 ?591 No ? ?

1. From version 59: this feature is behind the media.peerconnection.rtpsourcesapi.enable preference (needs to be set to true). To change preferences in Firefox, visit about:config.

Document Tags and Contributors

 Contributors to this page: fscholz, Sheppy, jpmedley
 Last updated by: fscholz,