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• Save and re-stream RSTP video as straight UDP

  30 septembre 2013, par user1701362

  I am trying to write a program that will connect to a RTSP video source and redirect the video data to another location using UDP. I am also saving the RTSP packets to be able to replay the video stream at a latter moment in time as well. Right now my program can connect to the RTSP video stream and redirect and save, but when I try to look at the redirected video I get nothing using VLC.

  Currently the program just strips out the datagram from the RTSP video packets it receives in its open UDP socket and re-sends them using this code using the boost asio library.

  newVideoSocket->send_to(&dg.data[0], dg.data.size() ,Endpoint);

  When I look at the traffic using Wireshark I see that it is actually sending the data to the new address and it is recognized as a UDP packet, but when I try and view the video using VLC nothing happens. The video stream is Mpeg4 with the video encoded as H.264 and VLC can play it.

  I have tried to connect to the redirected stream as UDP and as RTP at both multicast and unicast addresses but have had no success. Do I need to add or take something out of the datagram before I resend it ? Or is it something wrong with how I am tring to view it in VLC ? Thanks for the help.

• Only show prompt if there is more than one screen.

  30 décembre 2019, par blueimp

  Only show prompt if there is more than one screen.
  Use the default screen when no index is entered.
  

• Prepare mp4 videos for Media Source Extensions API using ffmpeg

  6 février 2018, par ler

  This command produce init.mp4 + bunch of m4s files, i’m trying to play them using MSE :

  ffmpeg -i <input file="file" /> -f hls -hls_segment_type fmp4 -c:v copy playlist.m3u8

  This is the client side code i’m using :

  var socket = io();
  
  var video = document.querySelector('video');
  
  var mimeCodec = 'video/mp4; codecs="avc1.64000d,mp4a.40.2"'; 
  
  if ('MediaSource' in window && MediaSource.isTypeSupported(mimeCodec)) {
  
      var mediaSource = new MediaSource;
  
      video.src = URL.createObjectURL(mediaSource);
  
      mediaSource.addEventListener('sourceopen', sourceOpen);
  
  } else {
  
      console.error('Unsupported MIME type or codec: ', mimeCodec);
  
  }
  
  function sourceOpen (_) {
  
    var mediaSource = this;
  
    var sourceBuffer = mediaSource.addSourceBuffer(mimeCodec);
  
    sourceBuffer.mode = 'sequence'; 
  
    socket.on('broadcast', function (newPiece) {
  
        // here i'm getting the buffer of the video  == buffer
  
        sourceBuffer.addEventListener('updateend', function (_) {
  
          video.play().then(function() { }).catch(function(error) { });
  
        });
  
        sourceBuffer.appendBuffer(buffer); // when the seconde video comes i append it's buffer
  
    })
  
  };

  Everything works fine when i send init.mp4 file followed by playlist0.m4s, playlist1.m4s, playlist2.m4s, .....
  But when i try to play init.mp4 file followed immediately 6,7,8 not 0,1,2 meaning playlist6.m4s, playlist7.m4s, playlist8.m4s, ...., it didn’t work.
  I don’t know why, this supposed to be live video, the viewer that is watching the live from the beginning gets init.mp4, playlist0.m4s, playlist1.m4s, playlist2.m4s, .....
  Someone that came after 5 minutes gets something like this init.mp4, playlist32.m4s, playlist33.m4s, playlist34.m4s, .... and so on, but so far it works only for the viewer that get’s init.mp4, playlist0.m4s, playlist1.m4s, playlist2.m4s, ..... the video can’t play for the others