Video capture of desktop to stream

void Start()
{
  webCamTexture = new WebCamTexture();
  webCamTexture.Play();
  Debug.Log("Camera width: " + webCamTexture.width);
  Debug.Log("Camera height: " + webCamTexture.height);
  renderer.material.mainTexture = webCamTexture;

  _webCamTextureToMatHelper = gameObject.GetComponent<WebCamTextureToMatHelper>();
  _webCamTextureToMatHelper.Initialize();
}

void Update()
{
  if (_webCamTextureToMatHelper.IsPlaying() && _webCamTextureToMatHelper.DidUpdateThisFrame())
  {
    Mat rgbaMat = _webCamTextureToMatHelper.GetMat();
    _texture = new Texture2D(rgbaMat.cols(), rgbaMat.rows(), TextureFormat.RGBA32, false);
    Utils.matToTexture2D(rgbaMat, _texture);
  }
  Texture2D tex = new Texture2D(webCamTexture.width, webCamTexture.height);
  tex.