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• FFMPEG on Linux (Mono)

  28 novembre 2016, par Paulo Anjos

  I’m creating a Discord Bot and I’m using Dot.Net. So I downloaded the necessary libs (ffmpeg and opus [for Discord]) and I’m running the .exe with Mono.

  I’m downloading a video file (mp4) and using FFMPEG to adjust the audio (16-bit, 48000Hz, PCM, 2 channels) and send it to the Discord Channel.

  It works fine on Windows but it refuses to on Linux (Ubuntu 14.04).
  It justs hangs and doesn’t do anything else like
  this image shows.

  Same .exe but in Windows now (to compare if needed) : image link

  I thought it was something with my Virtual Private Server but the same problem occured with my local Ubuntu 14.04 virtual machine.

  Code to send the song to Discord (Dot.Net) :

  async public void playAudio(Music m)
  
  {
  
      string path = "mp4" + Path.DirectorySeparatorChar + m.videoid + ".mp4";
  
      Process mProcess = Process.Start(new ProcessStartInfo
  
      {
  
          FileName = "ffmpeg",
  
          Arguments = //"-loglevel quiet " +
  
          "-i " + (char)34 + path + (char)34 + " " +
  
          "-f s16le -ar 48000 -ac 2 pipe:1",
  
          UseShellExecute = false,
  
          CreateNoWindow = false,
  
          RedirectStandardOutput = true, //stdout of the process
  
          RedirectStandardError = false,
  
          Verb = "runas"
  
      });
  
      while (!Utils.isRunning(mProcess)) { await Task.Delay(500); }
  
  
  
      while (true)
  
      {
  
          int blockSize = 3840;
  
          byte[] buffer = new byte[blockSize];
  
          int byteCount;
  
          byteCount = mProcess.StandardOutput.BaseStream.Read(buffer, 0, blockSize);
  
          if (byteCount == 0)
  
              break;
  
          if (stop_music)
  
              break;
  
          bot_audio.Send(buffer, 0, byteCount); //Send to Discord
  
      }
  
      ...
  
  }

  I find a little odd the libavresample   3.  1. 0 / 3.  1. 0 at the image (missing lib maybe ?).

  Any thoughts ?

• Discord.js Music Bot ffmpeg not installed ?

  16 mars 2020, par cccmdm

  I just started learning javascript with node.js and I am attempting to create a music bot, I’ve set up the command handler and everything, however, I keep getting this error when I try to run the play command

  Error : FFmpeg/avconv not found !
  at Function.getInfo (C :\Users\johnd\OneDrive\Desktop\discordBot\node_modules\prism-media\src\core\FFmpeg.js:130:11)
  at Function.create (C :\Users\johnd\OneDrive\Desktop\discordBot\node_modules\prism-media\src\core\FFmpeg.js:143:38)
  at new FFmpeg (C :\Users\johnd\OneDrive\Desktop\discordBot\node_modules\prism-media\src\core\FFmpeg.js:44:27)
  at AudioPlayer.playUnknown (C :\Users\johnd\OneDrive\Desktop\discordBot\node_modules\discord.js\src\client\voice\player\BasePlayer.js:47:20)
  at VoiceConnection.play (C :\Users\johnd\OneDrive\Desktop\discordBot\node_modules\discord.js\src\client\voice\util\PlayInterface.js:71:28)
  at C :\Users\johnd\OneDrive\Desktop\discordBot\commands\play.js:7:39
  at processTicksAndRejections (internal/process/task_queues.js:97:5)

  I’ll post my play function below

  async function playMusic(vc,songId) {
  
      const stream = await ytdl(songId,{type: 'opus',filter : 'audioonly'});
  
      vc.join().then(connection => {
  
          const dispatcher = connection.play(stream,{volume: 1});
  
          dispatcher.on('end', end => {
  
              console.log("Song ended!");
  
              vc.leave();
  
          }).catch(err => console.log(err));
  
      }).catch(err => console.log(err));
  
  }

  My proof of installation : https://imgur.com/a/EFM1G6s

• Why do my Windows filenames keep getting converted in FFMPEG ?

  14 avril 2024, par GeneralTully

  I'm running a script that walks through a large library of .flac music, making a mirror library with the same structure but converted to .opus. I'm doing this on Windows 11, so I believe the source filenames are all in UTF-16. The script calls FFMPEG to do the converting.

  


  For some reason, uncommon characters keep getting converted to different but similar characters when the script runs, for example :

  


  06 xXXi_wud_nvrstøp_ÜXXx.flac


  


  gets converted to :

  


  06 xXXi_wud_nvrstøp_ÜXXx.opus


  


  They look almost identical, but the Ü and I believe also the ø are technically slightly different characters before and after the conversion.

  


  The function which calls FFMPEG for the conversion looks like this :

  


  def convert_file(pool, top, file):
    fullPath = os.path.join(top, file)
    # Pass count=1 to str.replace() just in case .flac is in the song
    # title or something.
    newPath = fullPath.replace(src_dir, dest_dir, 1)
    newPath = newPath.replace(".flac", ".opus", 1)

    if os.path.isfile(newPath):
        return None
    else:
        print("{} does not exist".format(newPath))
   
        cvt = [
            "Ffmpeg", "-v", "debug", "-i", fullPath, "-c:a", "libopus", "-b:a", "96k", newPath]
        print(cvt)

        return (
            fullPath,
            pool.apply_async(subprocess.run, kwds={
                "args": cvt,
                "check": True,
                "stdin": subprocess.DEVNULL}))


  


  The arguments are being supplied by os.walk with no special parameters.

  


  Given that the script is comparing filenames to check if a conversion needs to happen, and the filenames keep getting changed, it keeps destroying and recreating the same files every time the script runs.

  


  Why might this be happening ?

  


  edit : I have confirmed that if I manually execute the FFMPEG command in CMD, bypassing Python completely, it converts the original Unicode 0125 + 01410 to 0334 (U with umlaut), so this doesn't seem to be a Python problem.