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• How to dump RTSP to raw data file without encoding

  28 juin 2020, par Yves

  I've read this link : How to dump raw RTSP stream to file ?

  


  In this link, it seems that dumping RTSP stream to some formatted file, such as mp4, is normal.

  


  But I want to store the RTSP stream into the raw data files, instead of files like mp4, avi etc. And I should be able to extract data from the raw data files and send it out as RTSP stream too.

  


  In a word, this is what I need :

  


  

  1. receiving RTSP stream ---> 2. store RTSP data into raw data files ---> 3. read raw data files and send data as RTSP stream

  


  


  Why do I need this ?

  


  Because as my understanding, storing RTSP strema into some formatted file, such as mp4, needs to do an action of encoding (encode RTSP to mp4). But for me, I don't need this action, I simply need to store RTSP data and re-send it as RTSP stream. So if I can store RTSP into the raw-data file, instead of mp4, I don't need to spend computer resources on the action of encoding.

  


• Play audio files on a channel (Ubuntu Server)

  16 octobre 2018, par danielperales555

  I want to make a "soundboard" on my Discord Bot.

  The bot is currently running on Ubuntu Server 18.04 in a VPS Hosting.

  I installed ffmpeg via aptitude apt-get install ffmpeg, and the respective node modules on my project via npm : npm install ffmpeg-binaries --save and npm install node-opus --save

  I have this provisional code :

  //!play (sound)
  
  if (!args[0]) return message.channel.send('noCorrectSyntax'); //args is provided by module.run
  
  
  
  let sound = args[0];
  
  let isReady = true;
  
  
  
  if (isReady) {
  
      isReady = false;
  
      let voiceChannel = message.member.voiceChannel;
  
      if (!voiceChannel) return message.channel.send('noChannel');
  
  
  
      voiceChannel.join().then(connection =>{
  
          const dispatcher = connection.playFile(`../resources/audios/${sound}.mp3`);
  
          if (!dispatcher) return message.channel.send('notFound');
  
  
  
          console.log(`${new Date().toUTCString()} 》Playing ${sound} on ${message.member.voiceChannel.name}`);
  
  
  
          dispatcher.on("end", end => {
  
              voiceChannel.leave();
  
              console.log(`${new Date().toUTCString()} 》Finished`);
  
          });
  
      }).catch(err => console.log(err));
  
      isReady = true;
  
  } else {
  
      return message.channel.send('notAvailable');
  
  }

  When my bot joins the voice room, it leaves instantly without playing the sound.

  Am I doing something wrong by installing the ffmpeg codec this way ? Is a problem with the VPS ?

  (I tried with a new bot, installing ffmpeg on windows and setting the path and it worked fine)

• How to queue ffmpeg FIFO

  29 avril 2013, par Francois

  we build a service similar to youtube. Also converting runs fine with ffmpeg using this script from another post here :

  How do I set up an ffmpeg queue ?

  #!/bin/bash
  
  
  
  pipe=/tmp/ffmpeg
  
  
  
  trap "rm -f $pipe" EXIT
  
  
  
  # creating the FIFO    
  
  [[ -p $pipe ]] || mkfifo $pipe
  
  
  
  while true; do
  
  # can't just use "while read line" if we 
  
  # want this script to continue running.
  
  read line < $pipe
  
  
  
  # now implementing a bit of security,
  
  # feel free to improve it.
  
  # we ensure that the command is a ffmpeg one.
  
  [[ $line =~ ^ffmpeg ]] && bash <<< "$line"
  
  done

  This works pretty good when i send one by one to the named pipe. When i send more than one at same time the second one queues the terminal to the point the first one finished. if a try more than 2 the third one will not be transcoded.

  So i tried to workaround with background sending to get the terminal free (just drop the echo command and close the ssh connection) but this doesn't work, then i played around with screen -X but also no luck. Maybe someone has a good idea to deal this.

  What i wanna do is : Every uploaded video which is needed to transcode will send a echo to the named pipe. FIFO should match but not blocking the terminal. So i think i need something to really queue ffmpeg input.

  kindest regards
  Francois