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• ffmpeg live stream overlay issues,while any one of the stream is lost other streams are getting stuck

  29 mars 2013, par Samy

  So far we have done

  We have a video chat client which has a set of 9 video streams (users) with
  h.264 codec using Adobe FMS. Now, using ffmpeg we are able to combine these
  streams into one stream using the overlay (video) and amix (audio) filters.
  We are able to send the single combined stream to a live streaming service.
  The stream of the active speaker is shown in a bigger size using the scale
  property of ffmpeg.

  Code as follows :

  ffmpeg -i "rtmp://localhost/live/mystream" -i "rtmp://localhost/live/mystream2 " -i "rtmp://localhost/live/mystream3 "-filter_complex"nullsrc=size=300x300 [b1];[0:v] setpts=PTS-STARTPTS,scale=100x100 [s1];[1:v] setpts=PTS-STARTPTS,scale=200x200 [s2];[2:v]setpts=PTS-STARTPTS,scale=100x100 [s3];[b1][s1] overlay=shortest=1 [b1+s1];[b1+s1][s2] overlay=shortest=1 [b1+s2];
  
  [b1+s2][s3] overlay=shortest=1:x=100" out.mp4

  Help Needed in the following 2 major issues. Any help would be appreciated.

  1. Whenever the active speaker changes, the stream of that user should be shown in a bigger
     size. is this possible to do without restarting the ffmpeg process ?

  2. Right now, if one of the 9 streams stops, the ffmpeg process crashes.

• Discord bot : Fix ‘FFMPEG not found’

  14 mars, par Travis Sova

  I want to make my Discord bot join voice chat, but every time I run the command, I get an error message in the log(cmd) saying, FFMPEG not found.

  


  Picture of the error :

  


  

  


  This is the code :

  


  client.on('message', message => {
  // Voice only works in guilds, if the message does not come from a guild,
  // we ignore it
  if (!message.guild) return;

  if (message.content === '/join') {
    // Only try to join the sender's voice channel if they are in one themselves
    if (message.member.voiceChannel) {
      message.member.voiceChannel.join()
        .then(connection => { // Connection is an instance of VoiceConnection
          message.reply('I have successfully connected to the channel!');
        })
        .catch(console.log);
    } else {
      message.reply('You need to join a voice channel first!');
    }
  }
});


  


  this is my package.json file :

  


  {
  "name": "x",
  "version": "1.0.0",
  "main": "index.js",
  "scripts": {
    "start": "node index.js",
    "dev": "nodemon index.js"
  },
  "dependencies": {
    "discord.js": "^11.4.2",
    "dotenv": "^6.2.0",
    "ffmpeg": "0.0.4",
    "opusscript": "0.0.6"
  },
  "devDependencies": {
    "nodemon": "^1.18.9"
  }
}


  


• [C++][Linux + ffmpeg + h264 + rtsp + client] and [Window + ffmpeg + play video real time + server]

  21 avril 2015, par QuestionGuy

  I have a problem with ffmpeg and I don’t know how to continue. I have 2 computers :

  Client :

  • Run Ubuntu 14.04
  • FFmpeg installed
  • Use c++ language
  • Features : use ffmpeg to encode h264 video data from webcam of client laptop, then real time streaming to server

  Server :

  • Running Windows 7
  • FFmpeg installed
  • Use c++ language (MFC)
  • Features : Get real time data from client and show it on screen.

  I’ve just connected client to server and they can chat text data together, and I don’t have any idea to make real time video work.

  And my questions are :

  1. [Client] How to get video from webcam on laptop (using ffmpeg code), save it to buffer (raw data), encode it and send to server ?

     I use ffmpeg to get video from wc but it save to file. I really don’t want it. Code is :

     ffmpeg -f v4l2 -framerate 25 -video_size 640x480 -i /dev/video0 output.mkv

  2. [Client] How to get raw data from client, decode it and play it ?

     I have an idea to play it by using directshow in MFC.