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 Browsers
The definition of 'RTCRtpContributingSource' in that specification.		 Candidate Recommendation Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
RTCRtpContributingSourceChrome Full support 59Edge Full support ≤79Firefox 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 NoOpera No support NoSafari ? WebView Android Full support 59Chrome Android Full support 59Firefox 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 NoSafari iOS ? Samsung Internet Android Full support 7.0
audioLevelChrome No support NoEdge No support NoFirefox 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 NoOpera No support NoSafari ? WebView Android No support NoChrome Android No support NoFirefox 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 NoSafari iOS ? Samsung Internet Android No support No
sourceChrome Full support 59Edge Full support ≤79Firefox 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 NoOpera No support NoSafari ? WebView Android Full support 59Chrome Android Full support 59Firefox 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 NoSafari iOS ? Samsung Internet Android Full support 7.0
timestampChrome Full support 59Edge Full support ≤79Firefox 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 NoOpera No support NoSafari ? WebView Android Full support 59Chrome Android Full support 59Firefox 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 NoSafari 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.