Question

这是进程开始的ffmpeg.cs类中的代码。我的兄弟试图单独运行ffmpeg.exe并且它没有问题但是一旦他点击按钮并且进程开始他就会得到一个例外：

我的兄弟有windows xp 32bit，而我使用的是Windows 8 64bit，但ffmpeg.exe是32位版本，它可以在我的机器上运行。

using System;
using System.Windows.Forms;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Drawing;
using System.IO.Pipes;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.IO;

namespace ScreenVideoRecorder
{
    class Ffmpeg
    {
        NamedPipeServerStream p;
        String pipename = "mytestpipe";
        byte[] b;
        System.Diagnostics.Process process;
        string ffmpegFileName;
        string workingDirectory;

        public Ffmpeg()
        {
            workingDirectory = Path.GetDirectoryName(Application.LocalUserAppDataPath) + @"\workingDirectory";
            ffmpegFileName = @"\ffmpeg.exe";
            if (!Directory.Exists(workingDirectory))
            {
                Directory.CreateDirectory(workingDirectory);
            }
            ffmpegFileName = workingDirectory + ffmpegFileName;
        }

        public void Start(string pathFileName, int BitmapRate)
        {
            string outPath = pathFileName;
            p = new NamedPipeServerStream(pipename, PipeDirection.Out, 1, PipeTransmissionMode.Byte);
            b = new byte[1920 * 1080 * 3]; // some buffer for the r g and b of pixels of an image of size 720p

            ProcessStartInfo psi = new ProcessStartInfo();
            psi.WindowStyle = ProcessWindowStyle.Hidden;
            psi.UseShellExecute = false;
            psi.CreateNoWindow = true;
            psi.FileName = ffmpegFileName;
            psi.WorkingDirectory = workingDirectory;
            psi.Arguments = @"-f rawvideo -pix_fmt bgr0 -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v libx264 -r " + BitmapRate + " " + outPath;
            //psi.RedirectStandardOutput = true;
            process = Process.Start(psi);
            process.EnableRaisingEvents = false;
            p.WaitForConnection();
        }

这是他在电脑上收到的异常信息：

Application: ScreenVideoRecorder.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.ComponentModel.Win32Exception
Stack:
   at System.Diagnostics.Process.StartWithCreateProcess(System.Diagnostics.ProcessStartInfo)
   at System.Diagnostics.Process.Start()
   at System.Diagnostics.Process.Start(System.Diagnostics.ProcessStartInfo)
   at ScreenVideoRecorder.Ffmpeg.Start(System.String, Int32)
   at ScreenVideoRecorder.Form1.gkh_KeyDown(System.Object, System.Windows.Forms.KeyEventArgs)
   at Utilities.globalKeyboardHook.hookProc(Int32, Int32, keyboardHookStruct ByRef)
   at System.Windows.Forms.UnsafeNativeMethods.PeekMessage(MSG ByRef, System.Runtime.InteropServices.HandleRef, Int32, Int32, Int32)
   at System.Windows.Forms.Application+ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr, Int32, Int32)
   at System.Windows.Forms.Application+ThreadContext.RunMessageLoopInner(Int32, System.Windows.Forms.ApplicationContext)
   at System.Windows.Forms.Application+ThreadContext.RunMessageLoop(Int32, System.Windows.Forms.ApplicationContext)
   at System.Windows.Forms.Application.Run(System.Windows.Forms.Form)
   at ScreenVideoRecorder.Program.Main()

可能是什么问题？

为什么我在启动流程后会遇到win32exception？

0 个答案: