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RTCRtpContributingSource

The RTCRtpContributingSource dictionary of the the WebRTC API is used by getContributingSources() to provide information about a given contributing source (CSRC), including the most recent time a packet that the source contributed was played out.

The information provided is based on the last ten seconds of media received.

While the published specification describes this as an interface, it has since been changed to a dictionary in follow-up drafts.

Properties

audioLevel Read only Optional: A double-precision floating-point value between 0 and 1 specifying the audio level contained in the last RTP packet played from this source.
source Read only: A 32-bit unsigned integer value specifying the CSRC identifier of the contributing source.
timestamp Read only: A DOMHighResTimeStamp indicating the most recent time of playout of an RTP packet from the source.

Specifications

Specification	Status	Comment
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'RTCRtpContributingSource' 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	?
`timestamp`	59	?	59 Disabled 59 Disabled Starting in version 60, the `timestamp` is correctly computed based on the window's `Performance` time, rather than `Date.getTime()`. 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	?
`source`	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	?
`audioLevel`	No	?	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
`timestamp`	59	59	?	59 Disabled 59 Disabled Starting in version 60, the `timestamp` is correctly computed based on the window's `Performance` time, rather than `Date.getTime()`. 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
`source`	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
`audioLevel`	No	No	?	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

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