The getSynchronizationSources()
method of the RTCRtpReceiver
interface returns an array of RTCRtpContributingSource
instances, each corresponding to one SSRC (synchronization source) identifier received by the current RTCRtpReceiver
in the last ten seconds.
Syntax
var rtcRtpContributingSources = rtcRtpReceiver.getContributingSources()
Parameters
None.
Return value
An array of RTCRtpSynchronizationSource
instances. Each instance describes one of the synchronization sources that provided data to the incoming stream in the past ten seconds.
As you'll see in the documentarion for RTCRtpSynchronizationSource
, it inherits the properties of RTCRtpContributingSource
, including timestamp
, source
, and audioLevel
.
The synchronization source objects add a voiceActivityFlag
property, which indicates if the last RTP packet received contained voice activity.
Specifications
Specification | Status | Comment |
---|---|---|
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'getSynchronizationSources()' 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.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
getSynchronizationSources | Chrome Full support 73 | Edge Full support ≤79 | Firefox Full support 59 | IE No support No | Opera Full support 60 | Safari ? | WebView Android Full support 73 | Chrome Android Full support 73 | Firefox Android
Full support
59
| Opera Android Full support 52 | Safari iOS ? | Samsung Internet Android Full support 11.0 |
Audio tracks supported | Chrome Full support 73 | Edge Full support 79 | Firefox Full support 59 | IE No support No | Opera Full support 60 | Safari ? | WebView Android Full support 73 | Chrome Android Full support 73 | Firefox Android
Full support
59
| Opera Android Full support 52 | Safari iOS ? | Samsung Internet Android Full support 11.0 |
Video tracks supported | Chrome Full support 73 | Edge Full support ≤79 | Firefox Full support 68 | IE No support No | Opera Full support 60 | Safari ? | WebView Android Full support 73 | Chrome Android Full support 73 | Firefox Android
Full support
68
| Opera Android Full support 52 | Safari iOS ? | Samsung Internet Android Full support 11.0 |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- User must explicitly enable this feature.
- User must explicitly enable this feature.