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• Why doesnt this method redirect my output from .exe [ffmpeg] ?

  4 octobre 2013, par Exitos

  I have the method :

  public static string StartProcess(string exePathArg, string argumentsArg, int timeToWaitForProcessToExit)
  
      {
  
          string retMessage = "";
  
  
  
          using (Process p = new Process())
  
          {
  
              p.StartInfo.FileName = exePathArg;
  
              p.StartInfo.RedirectStandardOutput = true;
  
              p.StartInfo.Arguments = argumentsArg;
  
              p.StartInfo.UseShellExecute = false;
  
  
  
  
  
  
  
              try
  
              {
  
                  p.Start();
  
                  StreamReader myOutput = p.StandardOutput;
  
  
  
                  retMessage = "STANDARD OUTPUT: " +  myOutput.ReadToEnd();
  
  
  
                  p.WaitForExit(timeToWaitForProcessToExit);
  
              }
  
              catch (Exception ex)
  
              { 
  
                  retMessage = "EXCEPTION THROWN: " + ex.ToString();
  
  
  
              }
  
              finally
  
              {
  
                  try
  
                  {
  
                      p.Kill();
  
                  }
  
                  catch { }
  
              }
  
          }
  
  
  
          return retMessage;
  
      }

  But it doesnt redirect my output to retMessage. Anyone any ideas ? I tested the arguments in a bat file and output is definitely output.

  Cheers,
  Pete

• How to re-run ffmpeg rtsp to rtmp conversion process if the process gives error ?

  25 janvier 2023, par Samsul Islam

  currently, I am working on a project where I need to run rtsp to rtmp conversion using ffmpeg. but some how I am getting error after several minutes running the process and the process getting exited.
I want to run the process even if it gets error. I am using this command ffmpeg -re -rtsp_transport tcp -i rtsp://my-link -c:v copy -c:a aac -ar 44100 -ac 1 -f flv -flvflags no_duration_filesize rtmp://my-url

  


  I tried this bash script.

  


  #!/bin/bash
cmd="ffmpeg -re -rtsp_transport tcp -i $1 -c:v copy -c:a aac -ar 44100 -ac 1 -f flv -flvflags no_duration_filesize $2"
while true; do $cmd && break; done


  


  using this script I am able to run the process again if I get any error. but the problem is it doesn't stop even if I run kill -9 my-pid. it just re-runs the process.

  


• Convert video MP4 audio to MP3 using C#

  13 mars, par Tom Lee

  I have some videos in MP4 format and I'm trying to extract the audio from them.

  



  My code is :

  



  public static void Converter(string toConvert)
{
    toConvert = VideoFile + ".mp4";

    var join = VideoFile.Split("-").ToList();

    VideoFile = string.Format("{0} - {1}", join[0], join[1]);

    var outputFile = VideoFile + ".mp3";
    var mp3Out = "";

    var ffmpegProcess = new Process
    {
        StartInfo =
        {
            UseShellExecute = false,
            RedirectStandardInput = true,
            RedirectStandardOutput = true,
            RedirectStandardError = true,
            CreateNoWindow = true,
            FileName = Directory,
            Arguments = " -i " + toConvert + " -vn -f mp3 -ab 320k output " + outputFile
        }
    };

    ffmpegProcess.Start();
    ffmpegProcess.StandardOutput.ReadToEnd();
    mp3Out = ffmpegProcess.StandardError.ReadToEnd();
    ffmpegProcess.WaitForExit();

    if (!ffmpegProcess.HasExited)
    {
        ffmpegProcess.Kill();
    }
    Console.WriteLine(mp3Out);
}


  



  However, I get this error message :

  



  


  System.ComponentModel.Win32Exception : 'Access is denied'

  


  



  Any Ideas ?