RTCPeerConnection.getStreamById

The RTCPeerConnection.getStreamById() method returns the MediaStream with the given id that is associated with local or remote end of the connection. If no stream matches, it returns null.

Syntax

var mediaStream = pc.getStream(id);

Parameters

id

Is a DOMString corresponding to the stream to return.

Example

var stream = pc.getStreamById(myTrackId);
if (stream) {
  console.log("Found stream: " + stream.id);
}

Polyfill

Running the following code before any other code will create RTCPeerConnection.prototype.getStreamById() if it's not natively available.

// from: https://bugs.chromium.org/p/chromium/issues/detail?id=698163&desc=5#c10
RTCPeerConnection.prototype.getStreamById = function(id) {
  try {
    var localStreams = this.getLocalStreams();
    var remoteStreams = this.getRemoteStreams();
    var i;
    for (i = 0; i < localStreams.length; i++) {
     if (localStreams[i].id == id)
       return localStreams[i];
    }
    for (i = 0; i < remoteStreams.length; i++) {
     if (remoteStreams[i].id == id)
       return remoteStreams[i];
    }
  } catch(e) {}
  return null;
}

Specifications

Browser compatibility

[1] Though this method is not prefixed, the interface it belongs to was until Chrome 56.

See also

• WebRTC