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Editorial Team
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Asked: 2026-06-14T21:01:41+00:00

here is my code //Create process System.Diagnostics.Process pProcess = new System.Diagnostics.Process(); //strCommand is path

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here is my code

//Create process
System.Diagnostics.Process pProcess = new System.Diagnostics.Process();

//strCommand is path and file name of command to run
pProcess.StartInfo.FileName = "ffmpeg.exe";

//strCommandParameters are parameters to pass to program
pProcess.StartInfo.Arguments = "-i " + videoName;

pProcess.StartInfo.UseShellExecute = false;

//Set output of program to be written to process output stream
pProcess.StartInfo.RedirectStandardOutput = true;

//Start the process
pProcess.Start();

//Get program output
string strOutput = pProcess.StandardOutput.ReadToEnd();

//Wait for process to finish
pProcess.WaitForExit();

The command works, but strOutput string is empty, results are shown within the console. Am I missing something here?

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1 Answer

  1. Editorial Team

    It’s possible the program is writing its output to StandardError instead of StandardOutput. Try using .RedirectStandardError = true and then .pProcess.StandardError.ReadToEnd() to capture that output.

    If you need the possibility of capturing both standard error and standard out in (roughly) the proper interleave, you will likely need to use the async versions with callbacks on OutputDataReceived and ErrorDataReceived and using BeginOutput/ErrorReadLine.

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