ffmpeg c＃asp.net視頻轉換錯誤

Question

以下代碼顯示錯誤為“ StandardOut尚未重定向或進程尚未開始”。 這段代碼有什么問題？ 需要任何更改嗎？ 它總是通過catch異常清除過程。

static void ExecuteAsync()
            {
                if (File.Exists("Videos/output.flv"))
                try
                {
                    File.Delete("Videos/output.flv");
                }
                catch
                {
                    return;
                }

            try
            {
                process = new Process();
                ProcessStartInfo info = new ProcessStartInfo(@"e:\ffmpeg\bin\ffmpeg.exe", "-i cars1.flv -same_quant intermediate1.mpg");
                info.CreateNoWindow = false;
                info.UseShellExecute = false;
                info.RedirectStandardError = true;
                info.RedirectStandardOutput = true;
                process.StartInfo = info;
                process.EnableRaisingEvents = true;
                process.ErrorDataReceived += new DataReceivedEventHandler(process_ErrorDataReceived);
                process.OutputDataReceived += new DataReceivedEventHandler(process_OutputDataReceived);
                process.Exited += new EventHandler(process_Exited);
                process.Start();
                process.BeginOutputReadLine();
                process.BeginErrorReadLine();
            }
            catch (Exception ex)
            {
                if (process != null) process.Dispose();
            }
        }
        static int lineCount = 0;
        static void process_ErrorDataReceived(object sender, DataReceivedEventArgs e)
        {
            Console.WriteLine("Input line: {0} ({1:m:s:fff})", lineCount++, DateTime.Now);
            Console.WriteLine(e.Data);
            Console.WriteLine();
        }

        static void process_OutputDataReceived(object sender, DataReceivedEventArgs e)
        {
            Console.WriteLine("Output Data Received.");
        }

        static void process_Exited(object sender, EventArgs e)
        {
            process.Dispose();
            Console.WriteLine("Bye bye!");
        }
    }

Answer 1

將此設置為false：

info.RedirectStandardOutput = false;

文檔說：

若要使用StandardOutput，必須將ProcessStartInfo .. ::。UseShellExecute設置為false，並且必須將ProcessStartInfo .. ::。RedirectStandardOutput設置為true。 否則，從StandardOutput流中讀取將引發異常