#region 模拟控制台信号需要使用的API

            [DllImport("kernel32.dll")]
            static extern bool GenerateConsoleCtrlEvent(int dwCtrlEvent, int dwProcessGroupId);

            [DllImport("kernel32.dll")]
            static extern bool SetConsoleCtrlHandler(IntPtr handlerRoutine, bool add);

            [DllImport("kernel32.dll")]
            static extern bool AttachConsole(int dwProcessId);

            [DllImport("kernel32.dll")]
            static extern bool FreeConsole();

            #endregion

功能模块：

            //ffmpeg进程
            static Process ffmpegProcess = new Process();

            //ffmpeg.exe实体文件路径，建议把ffmpeg.exe及其配套放在自己的Debug目录下
            static string ffmpegPath = AppDomain.CurrentDomain.BaseDirectory + "\\ffmpeg.exe";

            /// <summary>
            /// 开始录制
            /// </summary>
            /// <param name="outFilePath">录屏文件保存路径</param>
            public static void Start(string outFilePath)
            {
                if (File.Exists(outFilePath))
                {
                    File.Delete(outFilePath);
                }

                string arguments = "-f gdigrab -s 1920x1080 -i desktop -qscale 0.01 " + outFilePath;

                ProcessStartInfo startInfo = new ProcessStartInfo(ffmpegPath);
                startInfo.WindowStyle = ProcessWindowStyle.Normal;
                startInfo.Arguments = arguments;
                startInfo.UseShellExecute = false;//不使用操作系统外壳程序启动
                startInfo.RedirectStandardError = true;//重定向标准错误流
                startInfo.CreateNoWindow = true;//默认不显示窗口
                startInfo.RedirectStandardInput = true;//启用模拟该进程控制台输入的开关
                //startInfo.RedirectStandardOutput = true;

                ffmpegProcess.ErrorDataReceived += new DataReceivedEventHandler(Output);//把FFmpeg的输出写到StandardError流中
                ffmpegProcess.StartInfo = startInfo;

                ffmpegProcess.Start();//启动
                ffmpegProcess.BeginErrorReadLine();//开始异步读取输出
            }

            /// <summary>
            /// 停止录制
            /// </summary>
            public static void Stop()
            {
                ffmpegProcess.StandardInput.WriteLine("q");//在这个进程的控制台中模拟输入q,用于停止录制
                ffmpegProcess.Close();
                ffmpegProcess.Dispose();
            }

            /// <summary>
            /// 控制台输出信息
            /// </summary>
            private static void Output(object sender, DataReceivedEventArgs e)
            {
                if (!String.IsNullOrEmpty(e.Data))
                {
                    Console.WriteLine(e.Data.ToString());
                }
            }