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• Evolution #4628 : Intégrer la fonction slugify

  13 janvier 2021, par RastaPopoulos ♥

  Chez nous (mais chez d’autres aussi), le slug n’est pas forcément toujours que pour l’URL, ça peut être pour sortir tel élément avec un identifiant donné par un humain, volontairement. Donc ils proposent plusieurs possibilités et quand on veut pas la notion d’URL dedans c’est bien : "identifiant" tout court.

  Reste à décider d’un verbe puisqu’on agit pour transformer un texte quelconque en slug. "normaliser_identifiant" pourquoi pas, ou "convertir_identifiant" ?

• StackOverflowException with Process in C#

  4 juin 2015, par user3633222

  I have a process, which runs in a console app. It runs forever.

  After a couple of days the app crashes with a StackOverflowException.

  The essence of the app is where I spin up a Process with FFMpeg.exe and creates a sceenshot of a video stream. It works very good but only for a few days at the time.

  I am pretty sure it has to do with the disposal of the FFMpeg or some internal Process stuff.

  Here is the code

  using ( Process ffmpegProcess = new Process() ) {
  
  
  
      //arguments for running ffmpeg
  
      ffmpegProcess.StartInfo.UseShellExecute = false;
  
      ffmpegProcess.StartInfo.CreateNoWindow = true;
  
      ffmpegProcess.StartInfo.RedirectStandardOutput = true;
  
  
  
      //specific for our screenshots
  
      ffmpegProcess.StartInfo.FileName = string.Concat( Environment.CurrentDirectory, Path.DirectorySeparatorChar, ffmpegProgramName );
  
  
  
      try {
  
          //todo: log this stopwatch somewhere perhaps
  
          processWatch.Start();
  
  
  
          //set arguments every time we want to create a new screen shot
  
          ffmpegProcess.StartInfo.Arguments = string.Format( @"-y -i {0}{1} -threads 0 -ss 00:00:01.000 -f image2 -s 620x349 -vframes 1 ../../web/{2}.jpg", server, streamPath, slug );
  
          ffmpegProcess.Start();
  
          ffmpegProcess.WaitForExit( 500 );
  
  
  
          Console.WriteLine( slug );
  
          Console.WriteLine( processWatch.Elapsed );
  
  
  
          processWatch.Reset();
  
          runCount++;
  
          cacheIndexer++;
  
  
  
          //lets see how many spins we've had!
  
          Console.WriteLine( string.Format( "SERVER CACHE INDEX : {0}", cacheIndexer ) );
  
          Console.WriteLine( string.Format( "RUN : {0}", runCount ) );
  
          Console.WriteLine( Environment.NewLine );
  
  
  
      } catch ( Exception ex ) {
  
          //Console.WriteLine( "Ex " + ex );
  
      }
  
  }

  The loop looks like this.

      public void RecurseTask() {
  
          /*
  
          You can try one of these, but you will se CPU usage go crazy and perhaps concurrency errors due IO blocking
  
  
  
          Parallel.ForEach( _videoStreamSlugs, ( e ) => _videoStreamScreenShots.GrabScreenShot( e ) );
  
  
  
          foreach ( var slug in _videoStreamSlugs ) {
  
              Task.Run( () => _videoStreamScreenShots.GrabScreenShot( slug ) );
  
          }
  
          */
  
  
  
          //we want to grab screen shots for every slug in out slug list!
  
          foreach ( var slug in _videoStreamSlugs ) {
  
              _videoStreamScreenShots.GrabScreenShot( slug );
  
          }
  
  
  
          //sleep for a little while
  
          Thread.Sleep( _recurseInterval );
  
  
  
          //A heavy clean up!
  
          //We do this, trying to avoid a stackoverflow excecption in the recursive method
  
          //Please inspect this if problems arise
  
          GC.Collect();
  
  
  
          //lets grab over again
  
          RecurseTask();
  
      }

  I added a GC.Collect out of curiosity to see if it made a difference.

  I am not doing a Windows Service.

• StackOverflowException with Process

  4 juin 2015, par user3633222

  I have a process, which runs in a console app. It runs forever.

  After a couple of days the app crashes with a StackOverflowException.

  The essence of the app is where I spin up a Process with FFMpeg.exe and creates a sceenshot of a video stream. It works very good but only for a few days at the time.

  I am pretty sure it has to do with the disposal of the FFMpeg or some internal Process stuff.

  Here is the code

                  using ( Process ffmpegProcess = new Process() ) {
  
  
  
                      //arguments for running ffmpeg
  
                      ffmpegProcess.StartInfo.UseShellExecute = false;
  
                      ffmpegProcess.StartInfo.CreateNoWindow = true;
  
                      ffmpegProcess.StartInfo.RedirectStandardOutput = true;
  
  
  
                      //specific for our screenshots
  
                      ffmpegProcess.StartInfo.FileName = string.Concat( Environment.CurrentDirectory, Path.DirectorySeparatorChar, ffmpegProgramName );
  
  
  
                      try {
  
                          //todo: log this stopwatch somewhere perhaps
  
                          processWatch.Start();
  
  
  
                          //set arguments every time we want to create a new screen shot
  
                          ffmpegProcess.StartInfo.Arguments = string.Format( @"-y -i {0}{1} -threads 0 -ss 00:00:01.000 -f image2 -s 620x349 -vframes 1 ../../web/{2}.jpg", server, streamPath, slug );
  
                          ffmpegProcess.Start();
  
                          ffmpegProcess.WaitForExit( 500 );
  
  
  
                          Console.WriteLine( slug );
  
                          Console.WriteLine( processWatch.Elapsed );
  
  
  
                          processWatch.Reset();
  
                          runCount++;
  
                          cacheIndexer++;
  
  
  
                          //lets see how many spins we've had!
  
                          Console.WriteLine( string.Format( "SERVER CACHE INDEX : {0}", cacheIndexer ) );
  
                          Console.WriteLine( string.Format( "RUN : {0}", runCount ) );
  
                          Console.WriteLine( Environment.NewLine );
  
  
  
                      } catch ( Exception ex ) {
  
                          //Console.WriteLine( "Ex " + ex );
  
                      }
  
                  }