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• Discord.js "Error : FFMPEG not found" but I'm pretty sure I have it

  21 février 2020, par Cole Perry

  I’m learning Discord.js and following this tutorial : https://discord.js.org/#/docs/main/stable/topics/voice . From the start, when I try to run- npm install ffmpeg-binaries I get a huge error message but it tells me to just use install ffmpeg so I did.

  Here is my Index.js page(I’ve replaced my token with * here) :

  const Discord = require('discord.js');
  
  const Colesbot = new Discord.Client();
  
  
  
  const token = '**********************************';
  
  
  
  Colesbot.on('ready', () =>{
  
      console.log('Slamsbot is online.');
  
  })
  
  
  
  Colesbot.on('message', msg=>{
  
     if(msg.content == "What up bot?"){
  
         msg.reply("Whats good pimp?")
  
     }
  
  });
  
  
  
  Colesbot.on('message', message=>{
  
      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 => {
  
                  message.reply('I have successfully connected to the channel!');
  
              }).catch(console.log);
  
      } else {
  
          message.reply('You need to join a voice channel first!');
  
        }
  
      }
  
   });
  
  
  
  //Event listener for new guild members
  
  Colesbot.on('guildMemberAdd', member =>{
  
      // Send the message to a designated channel on a server:
  
      const channel = member.guild.channels.find(ch => ch.name === 'general');
  
      // Do nothing if the channel wasn't found on this server
  
      if (!channel) return;
  
      // Send the message, mentioning the member
  
      channel.send(`Welcome to the server, ${member}. Please use the bot-commands channel to assign yourself a role.`);
  
  })
  
  
  
  Colesbot.login(token);
  
  
  
  
  
  
  
  exports.run = (client, message, args) => {
  
  
  
      let user = message.mentions.users.first || message.author;
  
  
  
  
  
  }

  If I type "/join" while not connected to a voice channel I get the proper message. However, if I try while I am I get this error message :

  Error: FFMPEG not found
  
  task_queues.js:94
  
  message:"FFMPEG not found"
  
  stack:"Error: FFMPEG not found\n    at Function.selectFfmpegCommand (c:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\node_modules\prism-media\src\transcoders\ffmpeg\Ffmpeg.js:46:13)\n    at new FfmpegTranscoder (c:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\node_modules\prism-media\src\transcoders\ffmpeg\Ffmpeg.js:7:37)\n    at new MediaTranscoder (c:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\node_modules\prism-media\src\transcoders\MediaTranscoder.js:10:19)\n    at new Prism (c:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\node_modules\prism-media\src\Prism.js:5:23)\n    at new VoiceConnection (c:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\node_modules\discord.js\src\client\voice\VoiceConnection.js:46:18)\n    at c:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\node_modules\discord.js\src\client\voice\ClientVoiceManager.js:63:22\n    at new Promise (<anonymous>)\n    at ClientVoiceManager.joinChannel (c:\Users\bobal\Documents\GitHub\Spotif...
  
  </anonymous>

  So I went to that folder and the file Ffmpeg.js is there and here is its contents :

  const ChildProcess = require('child_process');
  
  const FfmpegProcess = require('./FfmpegProcess');
  
  
  
  class FfmpegTranscoder {
  
    constructor(mediaTranscoder) {
  
      this.mediaTranscoder = mediaTranscoder;
  
      this.command = FfmpegTranscoder.selectFfmpegCommand();
  
      this.processes = [];
  
    }
  
  
  
    static verifyOptions(options) {
  
      if (!options) throw new Error('Options not provided!');
  
      if (!options.media) throw new Error('Media must be provided');
  
      if (!options.ffmpegArguments || !(options.ffmpegArguments instanceof Array)) {
  
        throw new Error('FFMPEG Arguments must be an array');
  
      }
  
      if (options.ffmpegArguments.includes('-i')) return options;
  
      if (typeof options.media === 'string') {
  
        options.ffmpegArguments = ['-i', `${options.media}`].concat(options.ffmpegArguments).concat(['pipe:1']);
  
      } else {
  
        options.ffmpegArguments = ['-i', '-'].concat(options.ffmpegArguments).concat(['pipe:1']);
  
      }
  
      return options;
  
    }
  
  
  
    /**
  
     * Transcodes an input using FFMPEG
  
     * @param {FfmpegTranscoderOptions} options the options to use
  
     * @returns {FfmpegProcess} the created FFMPEG process
  
     * @throws {FFMPEGOptionsError}
  
     */
  
    transcode(options) {
  
      if (!this.command) this.command = FfmpegTranscoder.selectFfmpegCommand();
  
      const proc = new FfmpegProcess(this, FfmpegTranscoder.verifyOptions(options));
  
      this.processes.push(proc);
  
      return proc;
  
    }
  
  
  
    static selectFfmpegCommand() {
  
      try {
  
        return require('ffmpeg-binaries');
  
      } catch (err) {
  
        for (const command of ['ffmpeg', 'avconv', './ffmpeg', './avconv']) {
  
          if (!ChildProcess.spawnSync(command, ['-h']).error) return command;
  
        }
  
        throw new Error('FFMPEG not found');
  
      }
  
    }
  
  }
  
  
  
  module.exports = FfmpegTranscoder;

  I also added ffmpeg to system path and it didn’t help :

  C:\ffmpeg
  
  C:\Users\bobal\Documents\GitHub\Spotify-Playlist-Discord-bot\ffmpeg

  I’m not quite sure what to do from here. If you need any other info I’d be glad to give it.

• Unable to livestream dynamically created data

  18 mars 2020, par Caltrop

  I’m trying to livestream dynamically created data on youtube using ffmpeg and node.js.

  The example below is supposed to stream random noise, however it just throws errors and doesn’t quite work.

  const height = 512,
  
      width = 512,
  
      cp = require('child_process'),
  
      command = `cd ffmpeg/bin && ffmpeg -hide_banner -f rawvideo -pix_fmt rgb24 -s ${width}x${height} -i - rtmp://a.rtmp.youtube.com/live2/${loginCredentials.streamKey}`,
  
      proc = cp.spawn(command, [], { shell: true });
  
  
  
  (f = () => {
  
      setTimeout(f, 1000/60);
  
      const data = new Uint8ClampedArray(width * height * 3).map(()=>Math.random()*255);
  
      proc.stdin.write(Buffer.from(data));
  
  })();
  
  proc.stderr.pipe(process.stdout);

  Apologies, I’m quite inexperienced with ffmpeg

  edit : full log below

  Input #0, rawvideo, from 'pipe:':
  
    Duration: N/A, start: 0.000000, bitrate: 157286 kb/s
  
      Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 512x512, 157286 kb/s, 25 tbr, 25 tbn, 25 tbc
  
  Stream mapping:
  
  events.js:174
  
        throw er; // Unhandled 'error' event
  
        ^
  
  
  
  Error: write EPIPE
  
      at afterWriteDispatched (internal/stream_base_commons.js:78:25)
  
      at writevGeneric (internal/stream_base_commons.js:67:3)
  
      at Socket._writeGeneric (net.js:711:5)
  
      at Socket._writev (net.js:720:8)
  
      at doWrite (_stream_writable.js:413:12)
  
      at clearBuffer (_stream_writable.js:522:5)
  
      at onwrite (_stream_writable.js:470:7)
  
      at WriteWrap.afterWrite [as oncomplete] (net.js:800:19)
  
  Emitted 'error' event at:
  
      at errorOrDestroy (internal/streams/destroy.js:107:12)
  
      at onwriteError (_stream_writable.js:430:5)
  
      at onwrite (_stream_writable.js:461:5)
  
      at _destroy (internal/streams/destroy.js:49:7)
  
      at Socket._destroy (net.js:613:3)
  
      at Socket.destroy (internal/streams/destroy.js:37:8)
  
      at afterWriteDispatched (internal/stream_base_commons.js:78:17)
  
      at writevGeneric (internal/stream_base_commons.js:67:3)
  
      at Socket._writeGeneric (net.js:711:5)
  
      at Socket._writev (net.js:720:8)

• Libav (ffmpeg) HW decoding problem with frames at the end of file - missing or corrupted

  25 mars 2020, par Hitokage

  My goal is to utilize HW accelerated decoding (using vdpau, h265 and Nvidia RTX) getting number of frames from video. Everything works unless the frames get to the end of the video. I am getting less frames than I try to decode usually the last but one is missing (I know strange, the last one is OK just not getting all of them) and sometimes neighboring frames are corrupted. I followed the docs regarding end of file situation. Here is the code :

  //getting first packet
  
  if (!packet.data)
  
    av_read_frame(formatContext, & packet);
  
  
  
  AVFrame * frame = av_frame_alloc();
  
  if (!frame)
  
    throw std::runtime_error("Cannot allocate packet/frame");
  
  
  
  //now trying to get frames from the video
  
  for (int i = 0; i < number; i++) {
  
    int err = 0;
  
    //feeding the codec
  
    while (err == 0) {
  
      if (packet.stream_index == videoStreamId)
  
        if ((err = avcodec_send_packet(codecContext, & packet)) != 0)
  
          break;
  
  
  
      av_packet_unref( & packet);
  
      err = av_read_frame(formatContext, & packet);
  
      //sending null packet to flush the buffers
  
      if (err == AVERROR_EOF) {
  
        packet.data = NULL;
  
        packet.size = 0;
  
      }
  
    }
  
  
  
    bool waitForFrame = true;
  
    while (waitForFrame) {
  
      int err = avcodec_receive_frame(codecContext, frame);
  
      if (err == AVERROR_EOF)
  
        waitForFrame = false;
  
  
  
      else if (err < 0)
  
        throw std::runtime_error("Cannot receive frame");
  
  
  
      if (frame -> format == pixFmt)
  
      //I get here only number-1 times

  Please note that the problem is happening only when I request the same number of frames as is the length of the video. Seems like the end of file situation is not handled properly. The frames get decoded ok if I try to get for example length-1 frames.

  I also tried to log the events and everything looks OK, just one frame is not there. This is a case where 64 frames long video is being decoded asking for 64 frames :

  Send packet 0 == 0 
  
  Read frame status: Success
  
  Send packet 1 == 0 
  
  Read frame status: Success
  
  Send packet 2 == 0 
  
  Read frame status: Success
  
  Send packet 3 == 0 
  
  Read frame status: Success
  
  Send packet 4 !=0 
  
  Send packet status: Resource temporarily unavailable
  
  Processing frame:0
  
  Send packet 4 !=0 
  
  Send packet status: Resource temporarily unavailable
  
  Processing frame:1
  
  Send packet 4 == 0 
  
  Read frame status: Success
  
  Send packet 5 == 0 
  
  Read frame status: Success
  
  Send packet 6 !=0 
  
  Send packet status: Resource temporarily unavailable
  
  Processing frame:2
  
  Send packet 6 !=0 
  
  Send packet status: Resource temporarily unavailable
  
  Processing frame:3
  
  
  
  ...
  
  Processing frame:56
  
  Send packet 60 !=0 
  
  Send packet status: Resource temporarily unavailable
  
  Processing frame:57
  
  Send packet 60 == 0 
  
  Read frame status: Success
  
  Send packet 61 == 0 
  
  Read frame status: Success
  
  Send packet 62 !=0 
  
  Send packet status: Resource temporarily unavailable
  
  Processing frame:58
  
  Send packet 62 !=0 
  
  Send packet status: Resource temporarily unavailable
  
  Processing frame:59
  
  Send packet 62 == 0 
  
  Read frame status: Success
  
  Send packet 63 == 0 
  
  Read frame status: End of file
  
  Set null packet
  
  Processing frame:60
  
  Send packet 64 == 0 
  
  Read frame status: End of file
  
  Set null packet
  
  Processing frame:61
  
  Send packet 65 !=0 
  
  Send packet status: End of file
  
  Processing frame:62
  
  Send packet 65 !=0 
  
  Send packet status: End of file
  
  End of file at receive frame