Recherche avancée

Sur d’autres sites (12771)

• Révision 17911 : Comparaion ’ =’ dans le scheduler de taches : cela permet d’ajouter une tache et...

  18 mai 2011, par cedric -

  define(’_DIRECT_CRON_FORCE’,true) ; même si le hit dure moins d’une seconde.

• Red5 live stream - huge delay on localhost

  23 janvier 2013, par user1958067

  I m running Red5 1.0.0 RC1, with JW Player and ffmpeg on Linux Mint14

  There is a huge delay while streaming, even when everythings happening on my machine/localhost.

  I do following steps :

  1. FFmpeg : ffmpeg -i 'http://localhost:port' rtmp://localhost/oflaDemo/live.flv

  2. Red5 : TCPnoDelay ist set to true.

  3. JW Player : Bufferlength is set to 0. Also tried 2 and 3.

   :

      <code class="echappe-js">&lt;script type=&amp;#39;text/javascript&amp;#39;&gt;<br />
  
       jwplayer(&amp;#39;mediaspace&amp;#39;).setup({<br />
  
      &amp;#39;flashplayer&amp;#39;: &amp;#39;player.swf&amp;#39;,<br />
  
      &amp;#39;file&amp;#39;: &amp;#39;live&amp;#39;,<br />
  
      &amp;#39;type&amp;#39;: &amp;#39;rtmp&amp;#39;,<br />
  
      &amp;#39;streamer&amp;#39;: &amp;#39;rtmp://localhost/oflaDemo&amp;#39;,<br />
  
      &amp;#39;controlbar&amp;#39;: &amp;#39;none&amp;#39;,<br />
  
      &amp;#39;autostart&amp;#39;: &amp;#39;true&amp;#39;,<br />
  
      &amp;#39;bufferlength&amp;#39;: &amp;#39;3&amp;#39;,<br />
  
      &amp;#39;width&amp;#39;: &amp;#39;640&amp;#39;,<br />
  
      &amp;#39;height&amp;#39;: &amp;#39;380&amp;#39;<br />
  
    });<br />
  
  &lt;/script&gt;
  
  

  The delay is something between 7-10 seconds !
  This all is happening on and from localhost, so bandwith shouldnt be the issue.

• ffmpeg process how to read from pipe to pipe in c#

  28 janvier 2024, par greg

  I need to read audio data from stream 1 to stream 2 passing the data through ffmpeg.
It works great when i input data from file and output to pipe :

  


  Process? CreateStream()
{
    return Process.Start(new ProcessStartInfo
    {
        FileName = @"sources\ffmpeg",
        Arguments = @"-i input.mp3 -f s16le pipe:1",
        UseShellExecute = false,
        RedirectStandardOutput = true
    });
}


  


  Or when i input data from pipe and output to file :

  


  Process? CreateStream()
{
    return Process.Start(new ProcessStartInfo
    {
        FileName = @"sources\ffmpeg",
        Arguments = @"-i pipe: -f s16le output.file",
        UseShellExecute = false,
        RedirectStandardInput = true
    });
}


  


  But if i try to do both :

  


  Process? CreateStream()
{
    return Process.Start(new ProcessStartInfo
    {
        FileName = @"sources\ffmpeg",
        Arguments = @"-i pipe:0 -f s16le pipe:1",
        UseShellExecute = false,
        RedirectStandardInput = true,
        RedirectStandardOutput = true
    });
}


  


  Runtime will hang in place printing :

  


  


  Input #0, matroska,webm, from 'pipe:0' :
Metadata :
encoder : google/video-file
Duration : 00:04:15.38, start : -0.007000, bitrate : N/A
Stream #0:0(eng) : Audio : opus, 48000 Hz, stereo, fltp (default)
Stream mapping :
Stream #0:0 -> #0:0 (opus (native) -> pcm_s16le (native))

  


  Output #0, s16le, to 'pipe:1' :
Metadata :
encoder : Lavf59.27.100
Stream #0:0(eng) : Audio : pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s (default)
Metadata :
encoder : Lavc59.37.100 pcm_s16le

  


  


  main function code (it is the same for all examples) :

  


  async Task Do()
{
    using (var ffmpeg = CreateStream())
    {
        if (ffmpeg == null) return;

        using (var audioStream = GetAudioStream())
        {
            await audioStream.CopyToAsync(ffmpeg.StandardInput.BaseStream);
            ffmpeg.StandardInput.Close();
        }

        //runtime will hang in here

        Console.WriteLine("\n\ndone\n\n"); //this won't be printed

        using (var outputStream = CreatePCMStream())
        {
            try
            {
                await ffmpeg.StandardOutput.BaseStream.CopyToAsync(outputStream);
            }
            finally
            {
                await outputStream.FlushAsync();
            }
        }
    }
}


  


  And the most interesting is if i remove RedirectStandardOutput = true string programm will work as expected printing a bunch of raw data to the console.

  


  I'd like to solve this problem without using any intermediate files and so on.