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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 ?

• FFMPEG how to use https dynamic url as input for amovie filter

  2 juillet 2020, par Johny Sharma

  Basically what i am trying to do is to calling a dynamic php url which is generating a audio file for me and just want to use that file as an input for amovie filter.
I hope you have understand my question.

  


  What i have done so far ?

  


  I have a FFMPEG code which is :

  


  ffmpeg-y -i 'bg-file.mp3' -c copy -map 0:0 -map 1:0 -filter_complex "amovie='/auth.php?input=string&l=hi&f.mp3':loop=999[sc][mix];[0:a][sc]sidechaincompress=threshold=0.100:ratio=20,volume=10dB:precision=fixed[bg], [bg][mix]amix=duration=first"  -c:a libmp3lame -ac 2  "save.mp3"


  


  This line is calling my dynamic url for generating the required song.

  


  "amovie='/auth.php?input=string&l=hi&f.mp3'


  


  Everything is working if i check them apart. but when i use them together the ffmpeg is giving the following error.

  


  [22] => [Parsed_amovie_0 @ 0x1378140] Failed to avformat_open_input '/auth.php?input=string&l=hi&f.mp3':loop=999'
[23] => [AVFilterGraph @ 0x1368ca0] Error initializing filter 'amovie' with args '/auth.php?input=string&l=hi&f.mp3':loop=999'
[24] => Error initializing complex filters.
[25] => No such file or directory


  


  I dont know is it possible to put a dynamically generated url as an input for amovie filter or not ?
if i open my dynamic url in browser its works like a mp3 file and play similar to any mp3 file.

  


  using this code to play that mp3 :

  


  header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($path));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
ob_clean();
flush();
readfile($path);
exit;


  


  This one looks similar to my query but slightly different and that's why i am still looking for a solution

  


  How to use https input with ffmpeg "amovie" filter ?

  


• Error (ERR_STREAM_DESTROYED) : Cannot call write after a stream was destroyed

  3 avril 2021, par TTT Tobi Triple Talk

  I'm getting this error when I run my discord bot on my raspberry pi. It worked everytime when I run it on my windows machine. I installed FFmpeg with sudo apt-get install ffmpeg. I don't know if I need to install something else for ffmpeg on my raspberry pi
This is the error I'm getting

  


  events.js:291
      throw er; // Unhandled 'error' event
      ^

Error [ERR_STREAM_DESTROYED]: Cannot call write after a stream was destroyed
    at doWrite (_stream_writable.js:399:19)
    at writeOrBuffer (_stream_writable.js:387:5)
    at Socket.Writable.write (_stream_writable.js:318:11)
    at PassThrough.ondata (_stream_readable.js:718:22)
    at PassThrough.emit (events.js:314:20)
    at addChunk (_stream_readable.js:297:12)
    at readableAddChunk (_stream_readable.js:272:9)
    at PassThrough.Readable.push (_stream_readable.js:213:10)
    at PassThrough.Transform.push (_stream_transform.js:152:32)
    at PassThrough.afterTransform (_stream_transform.js:96:10)
Emitted 'error' event on FFmpeg instance at:
    at errorOrDestroy (internal/streams/destroy.js:108:12)
    at FFmpeg.onerror (_stream_readable.js:754:7)
    at FFmpeg.emit (events.js:314:20)
    at Socket.processError (node_modules/prism-media/src/core/FFmpeg.js:64:40)
    at Socket.emit (events.js:314:20)
    at errorOrDestroy (internal/streams/destroy.js:108:12)
    at onwriteError (_stream_writable.js:418:5)
    at onwrite (_stream_writable.js:445:5)
    at doWrite (_stream_writable.js:399:11)
    at writeOrBuffer (_stream_writable.js:387:5) {
  code: 'ERR_STREAM_DESTROYED'
}


  


  Normally it should play an audio stream to a discord channel.
I don't think my code is wrong, because it's working on my other computer.
My code :

  


  let stream;
//Meme.url is just a youtube link, like https://www.youtube.com/watch?v=dQw4w9WgXcQ
stream = ytdl(meme.url, {
    filter: "audioonly",
    opusEncoded: true,
    encoderArgs: ['-af', "dynaudnorm=f=150"]
}).on("error", (err) => {
    console.log(err);
});
    try {
        song_queue.connection.play(stream, { type: "opus" })
        .on('finish', () => {
            
        });
    } catch (err) {
        console.log(err);
        message.channel.send("Error while the meme song");
    }