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• How to speed up ffmpeg video conversion

  22 avril 2018, par user2993497

  ffmpeg -i video.mp4 -c:v libvpx-vp9 -keyint_min 150 -g 150 -tile-columns 4 -frame-parallel 1  -f webm -dash 1 -an -vf scale=160:190 -b:v 250k -dash 1 video_160x90_250k.webm -an -vf scale=320:180 -b:v 500k -dash 1 video_320x180_500k.webm -an -vf scale=640:360 -b:v 750k -dash 1 video_640x360_750k.webm -an -vf scale=640:360 -b:v 1000k -dash 1 video_640x360_1000k.webm -an -vf scale=1280:720 -b:v 1500k -dash 1 video_1280x720_1500k.webm

  I’m converting a single video into multiple videos at different resolutions. But it’s painfully slow. how can I speed this up ?

• 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