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• Running ffmpeg.exe through windows service fails to complete while dealing with large files

  28 avril 2013, par Harun

  I am using ffmpeg.exe to convert video files to flv format. For that purpose i use a windows service to run the conversion process in background. While trying to convert large files(i experienced it when the file size is >14MB) through windows service it gets stuck at the line which starts the process(ie, process.start();).

  But when i tried to execute ffmpeg.exe directly from command prompt it worked with out any problems.

  My code in windows service is as follows :

  private Thread WorkerThread; 
  
  protected override void OnStart(string[] args)
  
  { 
  
  
  
     WorkerThread = new Thread(new ThreadStart(StartHandlingVideo));
  
     WorkerThread.Start();
  
  }
  
  
  
  protected override void OnStop()
  
  { 
  
     WorkerThread.Abort();
  
  }
  
  
  
  private void StartHandlingVideo()
  
  {   
  
     FilArgs = string.Format("-i {0} -ar 22050 -qscale 1 {1}", InputFile, OutputFile);
  
     Process proc;
  
     proc = new Process();
  
  
  
     try
  
     {
  
  
  
       proc.StartInfo.FileName = spath + "\\ffmpeg\\ffmpeg.exe";
  
       proc.StartInfo.Arguments = FilArgs;
  
       proc.StartInfo.UseShellExecute = false;
  
       proc.StartInfo.CreateNoWindow = false;
  
       proc.StartInfo.RedirectStandardOutput = true;
  
       proc.StartInfo.RedirectStandardError = true;
  
  
  
       eventLog1.WriteEntry("Going to start process of convertion");
  
  
  
       proc.Start();
  
  
  
       string StdOutVideo = proc.StandardOutput.ReadToEnd();
  
       string StdErrVideo = proc.StandardError.ReadToEnd();
  
  
  
       eventLog1.WriteEntry("Convertion Successful");
  
       eventLog1.WriteEntry(StdErrVideo);               
  
   }
  
   catch (Exception ex)
  
   {
  
       eventLog1.WriteEntry("Convertion Failed");
  
       eventLog1.WriteEntry(ex.ToString());            
  
   }
  
   finally
  
   {
  
       proc.WaitForExit();
  
       proc.Close();
  
   }

  How can I get rid of this situation.

• trim MULTIPLE .mp4 files using ffmpeg in WINDOWS DOS

  22 février 2014, par user1530322

  My goal is to trim the first 4 seconds of, say 100 .mp4 files at once.

  I can easyly do it and in a quite quick way for one single .mp4 file at a time using :

  **ffmpeg -i MYFILE.mp4 -ss 00:00:04.000 -c:v copy -c:a copy Trimmed_MYFILE.**mp4

  I have a folder with those 100 mp4 files and want to bulk trim the first 4 seconds and save the new files on a folder in the same location called "newfiles".

  I'm imagining something like a loop, using FOR or so, but have no ideia how to do it.

  Thank you in advanced

• trim MULTIPLE .mp4 files using ffmpeg in Windows commandline

  13 janvier 2015, par user1530322

  My goal is to trim the first 4 seconds of, say 100 .mp4 files at once.

  I can easyly do it and in a quite quick way for one single .mp4 file at a time using :

  ffmpeg -i MYFILE.mp4 -ss 00:00:04.000 -c:v copy -c:a copy Trimmed_MYFILE.mp4
  

  I have a folder with those 100 mp4 files and want to bulk trim the first 4 seconds and save the new files on a folder in the same location called "newfiles".

  I’m imagining something like a loop, using FOR or so, but have no idea how to do it.