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• I want to reduce video file size but still have a good video quality, how should I write the code using ffmpeg ?

  9 décembre 2019, par Inibuat Maengame

  First of all, I’ve downloaded some videos to watch, and each file has more than 500MB file size. But due to the vast amount of videos I have at the moment, my 3 external hard drives are crying.
  Up till today, I’ve been using BENCOS to reduce the size...
  I always set the preset to very slow, codec h264, profile : high, and the mode is (probably) fixed bitrate on 736kbps.
  With those settings,
  I was able to reduce the size from 400-600MB into 100-110MB with acceptable video quality.
  But, since BENCOS has stopped its service since ages ago, I’ve been trying FFmpeg lately.

  Using those same settings, -crf 22, -preset veryslow, profile:high, the file size doesn’t really reduce that much... from 500MB to 200MB-ish with a much lower video quality compared to BENCOS.

  How are you guys able to reduce the file size by a huge margin compared to the original but still retain the quality using FFmpeg..?
  what commands I should put into the FFmpeg to get a result as good as BENCOS..?

  Thanks in advance...

• Cannot build FFmpeg 4.2 whatever I disable/enable (Cygwin)

  19 novembre 2020, par kubinka0505

  I have a strange (or maybe not) problem. As the title says I cannot compile FFmpeg.

  


  First I need to state that I have completely no experience in C, (which FFmpeg is primarily made in) not even mentioning its compilation, so I probably will not be able to change any of its source code.

  


  What I want to achieve - I want to have a static executable binary file (ffmpeg.exe) without any audio encoders/decoders. I mainly want it because of the smaller file size.

  


  ---

  


  I'm using :

  


  

  • Cygwin (and packages installed from that page's instruction)

  


  • Windows 7 64-bit

  


  


  ---

  


  Steps that I've done (for testing purposes) :

  


  

  1. I've trying to build it after watching that video

  


  2. With the following command :

  


  


  ./configure --disable-libmp3lame --enable-static


  


  Log is avaliable here

  


  ---

  


  Please give me information about what am I doing wrong and how to fix this. I'm struggling with it for over a week.

  


• Discord bot returning odd error message and not playing sound

  26 février 2020, par Ravenr_

  I am attempting to create a function of my discord bot that will join your voice channel then play something from youtube as specified in the command

  i.e. $play <youtube link="link"></youtube>

  The problem is that my bot joins the voice channel but doesn’t play any sound and outputs an error to the console that I dont know how to fix

  My Code :

  const ytdl = require("ytdl-core");
  
  module.exports = {
  
      name: 'play',
  
      description: 'initiates music methods of the bot',
  
      execute(msg, args){
  
          var servers = {};
  
  
  
          function play(connection, msg){
  
              var server = servers[msg.guild.id];
  
  
  
              server.dispatcher = connection.playStream(ytdl(server.queue[0], {filter: "audioonly"}));
  
              server.queue.shift();
  
  
  
              server.dispatcher.on("end", function(){
  
                  if(server.queue[0]){
  
                      play(connection, msg);
  
                  }else{
  
                      connection.disconnect();
  
                  }
  
              });
  
  
  
  
  
          }
  
          if(!args[1]){
  
              return msg.channel.send("you need to provide a link");
  
          } 
  
          if(!msg.member.voiceChannel){
  
              return msg.channel.send("You must be in a voice channel to use this feature");
  
          }
  
          if(!servers[msg.guild.id]) servers[msg.guild.id] = {
  
              queue: []
  
          }
  
          var server = servers[msg.guild.id];
  
          server.queue.push(args[1]);
  
          if(!msg.guild.voiceConnection) msg.member.voiceChannel.join().then(function(connection){
  
              play(connection, msg);
  
          })
  
      }
  
  }

  The Error :

  2020-02-26T16:31:59.458215+00:00 app[worker.1]: (node:4) UnhandledPromiseRejectionWarning: TypeError [ERR_INVALID_ARG_TYPE]: The "file" argument must be of type string. Received an instance of Object
  
  2020-02-26T16:31:59.458223+00:00 app[worker.1]:     at validateString (internal/validators.js:117:11)
  
  2020-02-26T16:31:59.458224+00:00 app[worker.1]:     at normalizeSpawnArguments (child_process.js:406:3)
  
  2020-02-26T16:31:59.458224+00:00 app[worker.1]:     at Object.spawn (child_process.js:542:16)
  
  2020-02-26T16:31:59.458225+00:00 app[worker.1]:     at new FfmpegProcess (/app/node_modules/prism-media/src/transcoders/ffmpeg/FfmpegProcess.js:14:33)
  
  2020-02-26T16:31:59.458225+00:00 app[worker.1]:     at FfmpegTranscoder.transcode (/app/node_modules/prism-media/src/transcoders/ffmpeg/Ffmpeg.js:34:18)
  
  2020-02-26T16:31:59.458226+00:00 app[worker.1]:     at MediaTranscoder.transcode (/app/node_modules/prism-media/src/transcoders/MediaTranscoder.js:27:31)
  
  2020-02-26T16:31:59.458226+00:00 app[worker.1]:     at Prism.transcode (/app/node_modules/prism-media/src/Prism.js:13:28)
  
  2020-02-26T16:31:59.458227+00:00 app[worker.1]:     at AudioPlayer.playUnknownStream (/app/node_modules/discord.js/src/client/voice/player/AudioPlayer.js:97:35)
  
  2020-02-26T16:31:59.458231+00:00 app[worker.1]:     at VoiceConnection.playStream (/app/node_modules/discord.js/src/client/voice/VoiceConnection.js:478:24)
  
  2020-02-26T16:31:59.458232+00:00 app[worker.1]:     at play (/app/commands/play.js:11:44)

  for reference these are the links I tested it with 1 & 2

  I’m not sure how to make queue[0] a string, which is what I assume the problem is.

  I was thinking of using a toString() i.e. server.queue[0].toString() but I think that will just return the memory address.

  If anyone can help me know what the issue is or how to fix it, that would be great.