Custom video effects using OnVideoFrameBitmap or OnVideoFrameBuffer events

private void VideoCapture1_OnVideoFrameBitmap(object sender, VideoFrameBitmapEventArgs e)
{
    Graphics grf = Graphics.FromImage(e.Frame);

    grf.DrawString("Hello!", new Font(FontFamily.GenericSansSerif, 20), new SolidBrush(Color.White), 20, 20);
    grf.Dispose();

    e.UpdateData = true;
}