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RTCRtpContributingSource.source

The read-only source property of the RTCRtpContributingSource interface returns the source identifier of a particular stream of RTP packets. The value is the contributing source (CSRC) or synchronization source (SSRC) identifier, depending on whether the object is an RTCRtpContributingSource or RTCRtpSynchronizationSource, which is based on the former.

Syntax

var sourceID = RTCRtpContributingSource.source

Value

An unsigned, 32-bit integer value which uniquely identifies the source of RTP packets described by this RTCRtpContributingSource (in which case the value is a CSRC identifier) or RTCRtpSynchronizationSource (the value is an SSRC identifier).

Specifications

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

Browser CompatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	59	?	59 Disabled 59 Disabled Disabled 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.	No	No	?

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	59	59	?	59 Disabled 59 Disabled Disabled 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.	No	?	7.0

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https://developer.mozilla.org/en-US/docs/Web/API/RTCRtpContributingSource/source