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• ffmpeg does not exit when pipe is closed ?

  9 juin 2024, par Thomas

  If this has already been brought up, I apologize. This is part of a software tuner package I am writing as a POC. It is used by Plex Media Server. For the most part, it works with good picture quality but leaves ffmpeg processes when the User clicks "Stop" or closes the browser, I assume plex is closing the socket and that ffmpeg is not erroring out, but I am not sure. this is part of a function where I pass in a TCP Client Network Stream.

  


  TCPListener waits for a call, when it accepts one, it passes the network stream off to this function below. When the TCP Client disconnects, ffmpeg never exits, waitforexit never returns.

  


  ffmpeg args :

  


  -hide_banner -loglevel error -i {0} -c copy -f mpegts pipe:1


  


  c#

  


   string Arguments = string.Format(ffmpegStreamOptions, URL,Overlay);
 Process p = new Process();
 p.StartInfo.UseShellExecute = false;
 p.StartInfo.RedirectStandardOutput = true;
 p.StartInfo.RedirectStandardError = true;
 p.StartInfo.CreateNoWindow = true;
 p.StartInfo.FileName = "ffmpeg.exe"; // Replace with your executable path
 p.StartInfo.Arguments = Arguments;
 
 p.Start();
 var errorMemoryStream = new MemoryStream();
 var programTask = Task.WhenAny(
     p.StandardOutput.BaseStream.CopyToAsync(client_stream


  


  ),
p.StandardError.BaseStream.CopyToAsync(errorMemoryStream)
) ;

  


   p.WaitForExit(); //stuck here after the connection is broken and never exits.


  


  Any help would be appreciated
Thanks !

  


• avconv : fix handling attachments in init_output_stream

  23 mai 2016, par Anton Khirnov

  avconv : fix handling attachments in init_output_stream
  The current code assumes that encoding_needed is simply an inverse of
  
  stream_copy, which is not true for manually attached files (for which
  
  neither of those is true).
  

  • [DBH] avconv.c

• How can i make the dashjs player respect the stream window ?

  6 mars 2021, par Octavia Kitsune

  I created the following command to i run on the serverside turn a source url into a cmaf dash stream :

  


  ffmpeg -loglevel error -re -i SOURCEURL -c copy -f dash -dash_segment_type mp4 -remove_at_exit 1 -seg_duration 2 -target_latency 1 -frag_type duration -frag_duration 0.1 -window_size 10 -extra_window_size 3 -streaming 1 -ldash 1 -use_template 1 -use_timeline 0 -index_correction 1 -tune zerolatency -fflags "+nobuffer+flush_packets" -format_options "movflags=cmaf" -adaptation_sets "id=0,streams=0 id=1,streams=1" -utc_timing_url "http://time.akamai.com/?iso&ms" stream/main.mpd


  


  And on the clientside i run a dashjs player with the following configuration :

  


    const video = document.getElementById('video')
  const player = dashjs.MediaPlayer().create()

  player.initialize(video, false, true)
  player.updateSettings({
    streaming: {
      stallThreshold: 0.05,
      lowLatencyEnabled: true,
      liveDelay: 1,
      liveCatchup: {
        minDrift: 1,
        playbackRate: 0.3,
        mode: 'liveCatchupModeDefault'
      },
      abr: {
        useDefaultABRRules: true,
        ABRStrategy: 'abrLoLP',
        fetchThroughputCalculationMode:
          'abrFetchThroughputCalculationMoofParsing'
      }
    }
  })


  


  My problem is, that dashjs loads a few segements and then tries to grab segments that error with a 404. It seems the segments it asks for fall out ot the window the stream defines.

  


  So i wonder how i can align my dashjs with my stream configuration so that it does respect the window defined by the stream, to basically simulate a livestream from any kind of videosource ?