使用AForge.NET Framework打开摄像头并截图 C#

videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
                    if (videoDevices.Count == 0)
                    {
                        MessageBox.Show("未检测到摄像头，请确认！");
                        return;
                    }
                    selectedDeviceIndex = 0;
                    videoSource = new VideoCaptureDevice(videoDevices[selectedDeviceIndex].MonikerString);//连接摄像头
                    int ResolutionIndex = 0;
                    for (int i = 0; i < videoSource.VideoCapabilities.Length; i++)
                    {
                        if (videoSource.VideoCapabilities[i].FrameSize.Width == 1600)  //1600*1200分辨率即可
                        {
                            ResolutionIndex = i;
                            break;
                        }
                    }
                    videoSource.VideoResolution = videoSource.VideoCapabilities[ResolutionIndex];
                    videoSourcePlayer1.VideoSource = videoSource;
                    // set NewFrame event handler
                    videoSourcePlayer1.Start();

if (videoSource == null)
                                return;
                            Bitmap bitmap = videoSourcePlayer1.GetCurrentVideoFrame();