WPF C# 代码打不开本地摄像头的问题记录

            string mrl = @"dshow://  ";
            string optVideo = @":dshow-vdev=Integrated Camera";
            //string optaudio = @":dshow-adev=麦克风 (Realtek(R) Audio)";
            string size = ":dshow-size=500";
            this.vlcControl.SourceProvider.MediaPlayer.Play(mrl, optVideo, size);

但是用安装软件能打开本地的 ，暂时未找到解决方法