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• How to convert live video stream to mp4 format stream using FFmpeg API [on hold]

  27 avril 2017, par krish

  Using FFmpeg API :ConvertLiveMediaTask

  ConvertLiveMedia(Stream inputStream, string inputFormat, Stream outputStream, string outputFormat, ConvertSettings settings) ;

  Requirement : want to convert video file from any format to mp4 format and conversion should happen on fly using ConvertLiveMedia API

  Please help me for this problem, I googled so many times i didnt get a solution for this.

  Here is my code

  const int megabyte = 1024 * 1024;
  
  
  
   static string theFilename = @"F:\BackUp\Short video clip-nature.avi";
  
  
  
   static string[] VideoExtension = { ".ac3", ".aiff", ".alaw", ".asf", ".ast", ".mp4", ".au", ".avi", ".caf"};
  
  
  
   static void Main(string[] args)
  
   {
  
       ChunkedData(theFilename, 0);
  
   }               
  
  
  
   private static void ChunkedData(string theFilename, long whereToStartReading = 0)
  
   {
  
        string extension = System.IO.Path.GetExtension(theFilename);
  
  
  
        Stream chunkStream = new MemoryStream();
  
  
  
        if (VideoExtension.Any(Vi => extension.Contains(Vi)))
  
        {
  
             FileStream fileStram = new FileStream(theFilename, FileMode.Open, FileAccess.Read);
  
  
  
             using (fileStram)
  
             {
  
                   byte[] buffer = new byte[megabyte];
  
  
  
                   fileStram.Seek(whereToStartReading, SeekOrigin.Begin);
  
  
  
                   int bytesRead = fileStram.Read(buffer, 0, megabyte);
  
  
  
                   while (bytesRead > 0)
  
                   {
  
                       // Here i receive and implement
  
                       chunkStream = StreamData(buffer, bytesRead, extension);
  
  
  
                       bytesRead = fileStram.Read(buffer, 0, megabyte);
  
                   }
  
            }
  
        }                          
  
   }               
  
  
  
   private static Stream StreamData(byte[] buffer, int bytesRead, string formate)
  
   {
  
      // Have no idea what to give for ConvertSettings, i simply pass a object
  
      ConvertSettings settings = new ConvertSettings();
  
  
  
      var ffmpeg = new FFMpegConverter();
  
  
  
      Stream inputStream = new MemoryStream(buffer);
  
  
  
      Stream outputStream = new MemoryStream();
  
  
  
      try
  
      {
  
         // Here im getting outputStream capacity = 0, length = 0, position =0.
  
         var task = ffmpeg.ConvertLiveMedia(inputStream, formate, outputStream, Format.mp4, settings );
  
         task.Start();
  
  
  
      }
  
      catch (Exception ex)
  
      {
  
            Console.WriteLine(ex.ToString());
  
      }
  
  
  
      return outputStream; 
  
  }

• Pre-Transcoding live streams before Re-stream them to wowza Streaming Engine [on hold]

  14 décembre 2017, par Ninja

  i’am using ffmpeg on other device to get live feed from cam and convert them to multi bitrate outputs localy and stream them to a remote wowza to achieve adaptive bitrate content for users with optimized resources i have succeeded to transcode to one specifique bitrate locally using this line

   ffmpeg -re -i cuted.mp4 -c:v libx264 -profile:v baseline -level:v 1.2 -r 12 -g 96 -vb 110000 -s 212x120 -c:a libvo_aacenc -ab 40000 -ar 22050 -ac 1 -f rtsp -muxdelay 0.1 rtsp://*****:*****@***.168.*0.*0:1935/live/myStream

  but i need at least 4 resolutions support i’ve tried to lunched twice at the same time with diffrent resolutions but in wowza engine manager => incoming streams i got one stream input, i appreciate any suggestion

• Evolution #4779 (Nouveau) : Déclarer fonctions variadiques au lieu d’utiliser func_get_args

  9 mai 2021, par jluc -

  PHP recommande de ne pas utiliser func_get_args mais de déclarer explicitement comme variadiques les fonctions, en passant les arguments avec "...", au lieu de les récupérer avec func_get_args. cf https://www.php.net/manual/fr/functions.arguments.php#functions.variable-arg-list en français pas toujours bien traduit, ou https://www.php.net/manual/en/functions.arguments.php#functions.variable-arg-list en anglais.

  Exemple : remplacer l’actuel :
  

  function concat()  $args = func_get_args() ; return join(’’, $args) ; 
  

  
  par
  

  function concat (...$args) return join(’’, $args) ; 
  

  Rq : Il faut la syntaxe "..." pour que isVariadic() renvoie true. Ça augmente les capacités d’introspection. Utile par exemple pour #4717 + https://git.spip.net/spip/spip/pulls/160