Web/API/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.

Properties

audioLevel 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.

rtpTimestamp Optional

The RTP timestamp of the media played out at the time indicated by timestamp. This value is a source-generated time value which can be used to help with sequencing and synchronization.

source Optional

A 32-bit unsigned integer value specifying the CSRC identifier of the contributing source.

timestamp Optional

A DOMHighResTimeStamp indicating the most recent time at which a frame originating from this source was delivered to the receiver's MediaStreamTrack

Specifications

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

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
RTCRtpContributingSource	Chrome Full support 59	Edge Full support ≤79	Firefox Full support 59 Disabled' Full support 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.	IE No support No	Opera No support No	Safari ?	WebView Android Full support 59	Chrome Android Full support 59	Firefox Android Full support 59 Disabled' Full support 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.	Opera Android No support No	Safari iOS ?	Samsung Internet Android Full support 7.0
audioLevel	Chrome No support No	Edge No support No	Firefox Full support 59 Disabled' Full support 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.	IE No support No	Opera No support No	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 59 Disabled' Full support 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.	Opera Android No support No	Safari iOS ?	Samsung Internet Android No support No
source	Chrome Full support 59	Edge Full support ≤79	Firefox Full support 59 Disabled' Full support 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.	IE No support No	Opera No support No	Safari ?	WebView Android Full support 59	Chrome Android Full support 59	Firefox Android Full support 59 Disabled' Full support 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.	Opera Android No support No	Safari iOS ?	Samsung Internet Android Full support 7.0
timestamp	Chrome Full support 59	Edge Full support ≤79	Firefox Full support 59 Notes' Disabled' Full support 59 Notes' Disabled' Notes' 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.	IE No support No	Opera No support No	Safari ?	WebView Android Full support 59	Chrome Android Full support 59	Firefox Android Full support 59 Notes' Disabled' Full support 59 Notes' Disabled' Notes' 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.	Opera Android No support No	Safari iOS ?	Samsung Internet Android Full support 7.0

Legend

Full support  

Full support

No support  

No support

Compatibility unknown  

Compatibility unknown

See implementation notes.'

See implementation notes.

User must explicitly enable this feature.'

User must explicitly enable this feature.

RTCRtpContributingSource by Mozilla Contributors is licensed under CC-BY-SA 2.5.