Call to Process可与Debug一起正常使用，但在已安装的应用程序中不起作用

Question

I am developing a Windows Form program that has callings to ffmpeg library through the class Process .

It works fine when I run it with the Debug in Visual Studio 2013. But when I install the program and I invoke the operation that call to the ffmpeg Process , it doesn't work. The cmd screen appears an disappears and nothing happens.

I have tried to know what can be happening getting a log file with the output of ffmpeg , in case it was a problem in the ffmpeg libraries. However, after executing it the log is empty, what means that the ffmpeg command has not been executed.

Can someone help me, please?

The code is this:

ProcessStartInfo startInfo = new ProcessStartInfo();
startInfo.FileName = "cmd.exe";
startInfo.Arguments = "/c " + ffmpegPath + " " + commandArguments;
using (Process processTemp = new Process())
{
    processTemp.StartInfo = startInfo;
    processTemp.EnableRaisingEvents = true;
    processTemp.Start();
    processTemp.WaitForExit();
}

I am invoking to cmd.exe (not directly ffmpeg.exe ) because in the arguments sometimes there can be a pipe (that is why the command starts with " /c ").

Answer 1

Are you sure this isn't a privileges issue when trying to execute the cmd.exe (eg you need administrator privileges)

try adding

startInfo.Verb = "runas";

Paul

Answer 2

Hmm its not a path issue with spaces in file/directory names is it? For ffmpegPath or one of your command parameters (if a file path). Surround all file paths with ' like below.

Try surrounding any file paths with '

 startInfo.Arguments = "/c '" + ffmpegPath + "' " + commandArguments;

Also you could try adding /K to the cmd command call to stop if from closing the command prompt when it finishes. It might tell you the error before it closes the window but you wont see it if it closes so quickly

Good luck :) Paul