Reducing the Video Quality of the WebRTC Call

RTCClient.swift

static let LOCAL_VIDEO_TRACK_ID = "Your Local Video Track ID here"
static let AUDIO_TRACK_ID = "Your Local Audio Track ID here"

//...

func createLocalMediaStream() {
  
  //...
  let peerConnectionFactory = RTCPeerConnectionFactory()
  let localMediaStream = peerConnectionFactory.mediaStream(withStreamId: LOCAL_VIDEO_TRACK_ID)

  var mandatoryConstraints: [String: String]?

  //Add audio track to the stream
  let localAudioTrack = peerConnectionFactory.audioTrack(withTrackId: AUDIO_TRACK_ID)
  localMediaStream.addAudioTrack(localAudioTrack)

  if lowDataModeEnabled {
    //If low data mode is enabled, 
    mandatoryConstraints = ["minFrameRate": "1", "maxFrameRate": "15"]
  }

  //Create the video source
  let constraints = RTCMediaConstraints(mandatoryConstraints: mandatoryConstraints, optionalConstraints: nil)
  let videoSource = peerConnectionFactory.avFoundationVideoSource(with: constraints)

  //Create the video track from the video source
  let localVideoTrack = peerConnectionFactory.videoTrack(with: videoSource, trackId: LOCAL_VIDEO_TRACK_ID)
  localMediaStream.addVideoTrack(localVideoTrack)
  
  //...
}

//...