这是启动进程的 ffmpeg.cs 类中的代码。我的兄弟试图单独运行 ffmpeg.exe 并且没有问题,但是一旦他单击按钮并且进程开始,他就会遇到异常:
我的兄弟有 windows xp 32 位,而我使用的是 windows 8 64 位,但 ffmpeg.exe 是 32 位版本,它在我的机器上工作。
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();
}
这是他在计算机上收到的异常消息:
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()
可能是什么问题呢 ?