Recherche avancée

Sur d’autres sites (10987)

• How do I include libraries in a ruby project ?

  9 janvier 2013, par user1860596

  I installed rvideo.

  gem install rvideo
  
  aptitude install ffmpeg

  I wrote the following using rvideo while reading a manual.

  #!/usr/bin/env ruby
  
  
  
  file = RVideo::Inspector.new(:file => "/home/user/r/input.mp4")
  
  file.fps        # => "29.97" 
  
  file.duration   # => "00:40:23.4" 
  
  
  
  transcoder = RVideo::Transcoder.new
  
  
  
  recipe = "ffmpeg -i $input_file$ -ar 22050 -ab 64 -f flv -r 29.97 -s"
  
  recipe += " $resolution$ -y $output_file$"
  
  recipe += "\nflvtool2 -U $output_file$"
  
  begin
  
  transcoder.execute(recipe, {:input_file => "/home/user/r/input.mp4",
  
  :output_file => "/home/user/r/output.flv", :resolution => "640x360"})
  
  rescue TranscoderError => e
  
  puts "Unable to transcode file: #{e.class} - #{e.message}"
  
  end
  
  
  
  transcoder.original     # RVideo::Inspector object
  
  transcoder.processed    # RVideo::Inspector object

  When I do :

  $ ruby hw.rb

  I get :

  first.rb:3: uninitialized constant RVideo (NameError)

  In the manual, I found this code :

  require 'test/unit/assertions'
  
  include Test::Unit::Assertions
  
  puts assert_equal nil == nil, nil.nil?

  How do I include rvideo library in my case ? How do I know the path to the library ?

• Is it good to use minterpolate in FFmpeg for reducing blurred frames

  30 mars 2022, par Udi

  I'm using FFMPEG to slice png files from videos.

  


  I'm slicing the videos in fps between 1-3 depending on some video metadata.
I can see that when the subjects in the video moving fast or the camera are not steady I will get blurred frames. I try to research how I can solve it (The quality of these frames is my main goal) and I tackled the minterpolate option.

  


  I think that if I will use the blend option that will mean the 3 frames to 1 the "noise" of the blurred subjects will reduce.

  


  So my current command now is like this :

  


  ./ffmpeg -i "/home/dev/ffmpeg/test/input/@3.mp4" -vf minterpolate=fps=1:mi_mode=blend,mpdecimate=hi=11456:lo=6720:frac=0.5 -vsync 0  "/home/dev/ffmpeg/test/output/3/(#%04d).png"


  


  Am I right ? Do you think of a better way to use FFMPEG to solve my problem ?

  


• Discord.js music bot : TypeError : this.inputMedia.pipe is not a function

  7 août 2019, par Ivs

  I’m writing a music Discord bot using Discord.js. The bot uses ytdl-core, node-opus, and I have installed ffmpeg on my OS (Ubuntu 19.04). When I try to make the bot join a voice channel and start playing a YouTube URL, it throws the following error :

  TypeError: this.inputMedia.pipe is not a function
  
      at FfmpegProcess.connectStream (/home/ivan/.../node_modules/discord.js/node_modules/prism-media/src/transcoders/ffmpeg/FfmpegProcess.js:73:21)
  
      at new FfmpegProcess (/home/ivan/.../node_modules/discord.js/node_modules/prism-media/src/transcoders/ffmpeg/FfmpegProcess.js:28:14)
  
      at FfmpegTranscoder.transcode (/home/ivan/.../node_modules/discord.js/node_modules/prism-media/src/transcoders/ffmpeg/Ffmpeg.js:34:18)
  
      at MediaTranscoder.transcode (/home/ivan/.../node_modules/discord.js/node_modules/prism-media/src/transcoders/MediaTranscoder.js:27:31)
  
      at Prism.transcode (/home/ivan/.../node_modules/discord.js/node_modules/prism-media/src/Prism.js:13:28)
  
      at AudioPlayer.playUnknownStream (/home/ivan/.../node_modules/discord.js/src/client/voice/player/AudioPlayer.js:97:35)
  
      at VoiceConnection.playStream (/home/ivan/.../node_modules/discord.js/src/client/voice/VoiceConnection.js:478:24)
  
      at voiceChannel.join.then.connection (/home/ivan/.../commands/play.js:32:47)
  
      at process._tickCallback (internal/process/next_tick.js:68:7)

  Here is my code :

  const ytdl = require("ytdl-core");
  
  
  
  exports.run = (client, message, args, config) => {
  
      return new Promise((resolve, reject) => {
  
          if (args.length !== 1) {
  
              message.channel.send("Play command takes 1 YouTube link.");
  
              reject("Wrong number of arguments");
  
              return;
  
          }
  
          const voiceChannel = message.member.voiceChannel;
  
          if(!voiceChannel) {
  
              message.channel.send("You need to connect to a voice channel first");
  
              reject("Not connected to voice channel");
  
              return;
  
          }
  
          const perms = voiceChannel.permissionsFor(message.client.user);
  
          if (!perms.has("CONNECT")) {
  
              message.channel.send("You need to add the 'connect' permission for this bot");
  
              reject("NO CONNECT PERMISSION");
  
              return;
  
          }
  
          if (!perms.has("SPEAK")) {
  
              message.channel.send("You need to add the 'speak' permission for this bot");
  
              reject("NO SPEAK PERMISSION");
  
              return;
  
          }
  
          const streamOptions = { seek: 0, volume: 1, passes: 2 };
  
          voiceChannel.join()
  
              .then(connection => {
  
                  const stream = ytdl(args[0], {filter: 'audioonly'});
  
                  const dispatcher = connection.playStream(ytdl, streamOptions);
  
                  dispatcher.on("end", reason => {
  
                      console.log("reason: " + reason);
  
                      voiceChannel.leave();
  
                  })
  
                  dispatcher.on("error", err => {
  
                      console.log(err);
  
                  })
  
              })
  
          .catch(err => console.log(err));
  
      });    
  
  }

  I have tried reinstalling ffmpeg, node and npm, discord.js and node-opus. I have the newest version of Discord.js installed, and ffmpeg version 4.1.3-0ubuntu1. Anyone have any suggestions ?

  Thanks.