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 Compatibility
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 59 | ? | 591 | No | No | ? |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | 59 | 59 | ? | 591 | No | ? | 7.0 |
1. 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.