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• Node package 'videoshow' ffmpeg error

  14 octobre 2015, par Jon Stevens

  I am using the npm library ’videoshow’ to build a video slideshow with images and audio. I have copied everything directly from the github wiki as far as installing the package and configuring ffmpeg to include the necessary flags. My code for the main ’generation.js’ node file :

  var videoshow = require('videoshow');
  
  
  
  var images = [
  
    '2.jpg',
  
    '4.jpg'
  
  ]
  
  
  
  var videoOptions = {
  
    fps: 25,
  
    loop: 5, // seconds
  
    transition: true,
  
    transitionDuration: 1, // seconds
  
    videoBitrate: 1024,
  
    videoCodec: 'libx264',
  
    size: '640x?',
  
    audioBitrate: '128k',
  
    audioChannels: 2,
  
    format: 'mp4'
  
  }
  
  
  
  videoshow(images, videoOptions)
  
    .audio('song.mp3')
  
    .save('video.mp4')
  
    .on('start', function (command) {
  
      console.log('ffmpeg process started:', command)
  
    })
  
    .on('error', function (err, stdout, stderr) {
  
      console.error('Error:', err)
  
      console.error('ffmpeg stderr:', stderr)
  
    })
  
    .on('end', function (output) {
  
      console.error('Video created in:', output)
  
    })

  Just running the above code with ’node generation.js’ which is the default usage and the exact settings they explain in the wiki is giving the error :

  ffmpeg process started : ffmpeg -i /tmp/videoshow-3fe871bc-e082-4ed8-bf47-f10c854f1718 -i /tmp/videoshow-a1595d76-dcbd-48c3-a8b3-cffac6951ed3 -y -filter_complex concat=n=2:v=1:a=0 video.mp4
  ffmpeg process started : ffmpeg -i /tmp/videoshow-7b78fd53-408f-40a8-8974-665f18f1fe41 -i song.mp3 -y -b:a 128k -ac 2 -r 25 -b:v 1024k -vcodec libx264 -filter:v scale=w=640:h=trunc(ow/a/2)*2 -f mp4 -map 0:0 -map 1:0 -t 10 -af afade=t=in:ss=0:st=0:d=3 -af afade=t=out:st=7:d=3 video.mp4
  Error : [Error : ffmpeg exited with code 1 : ]
  ffmpeg stderr : undefined

  If anyone has any experience at all with this library, any help is greatly appreciated !

• Music Video Idiosyncrasies

  18 juin 2011, par Multimedia Mike — General

  So I’m watching a fairly recent music video for a song named "XXXO" from an artist named M.I.A. when I’m suddenly assaulted by this imagery :

  
  
  

  ... and I enter nervous convulsions. You see, while this might seem to be an odd video effect to the casual viewer, to a multimedia hacker, it appears to be deliberately antagonistic. To anyone who has written a video codec, this scene looks like an entire casserole of video bugs, combining creeping plane offsets errors, chroma problems, and interlacing havoc. The craziest part is to realize that this is probably some kind of standard video effect / filter type. Upon a repeat viewing, I realized that the entire video sort of looks like an amateur video editor’s first week using video software.

  Elsewhere in the video, a YouTube-style video frame vortex highlights the proceedings. I guess I need to come to terms with the fact that the ubiquitous player frame is just part of the digital Zeitgeist now :

  
  
  

  Vintage Video Strangeness
  I’m a long-time music video junkie but I have a tendency of examining them entirely too closely. I first saw Paula Abdul’s video for "Cold-Hearted" when I was just starting to understand multimedia technology and how it interacted with emerging home computers. Imagine how confused I was when I tried to make sense of the actions performed by our eMaestro "Chuck" whom Paula has instructed to "hit it". First, he hits a key followed by 3 quick strikes on a second key :

  
  
  

  Then, the "start music" action is apparently bound to a particular key on the electronic keyboard :
  
  

  
  
  

  Which kicks off the electronic metronome on the computer. Each identical-sounding beat quizzically maps to a different frequency transform :

  
  
  a one...
  
  and a two...
  
  and a three...
  

  I had no trouble believing things up to this point. But even though I didn’t understand what was going on with that frequency transform, I knew that it must have had something to do with the audio. And if the audio was the same, the visualization ought to be the same. Though, to be fair, I will concede that the first and third ticks pictured bear some mutual resemblance.

  Anyway, the software is probably real even if the keyboard interaction was stylized. Can anyone identify the software ? What about the computer ? This is perhaps the best view the video gives us :

  
  
  

  So, remember, don’t base your understanding of technology — or anything, really — on stylized media representations. Don’t even get me started on the movie "Sneakers." That had me confused about cryptography and computer security for many years.

• Music bot doesn't play livestreams anymore

  31 janvier 2019, par Silvinator

  My Discord bot played YT Livestreams all the time, but it stopped working today. The only message I get (in the console) is stream. It plays normal videos, but no streams.
  The question is, why it stopped working ? I did not change any code. Anyone got a idea ?

  client.on("message", async message => {
  
    var args = message.content.substring(prefix.length).split(" ");
  
    if (!message.content.startsWith(prefix)) return;
  
    var searchString = args.slice(1).join(' ');
  
    var url = args[1] ? args[1].replace(/<(.+)>/g, '$1') : '';
  
    var serverQueue = queue.get(message.guild.id);
  
    switch (args[0].toLowerCase()) {
  
      case "play":
  
        var voiceChannel = message.member.voiceChannel;
  
        if (!voiceChannel) return message.channel.send(`Du willst mit mir Karaoke singen? Da ich eh nichts besseres zu tun habe. Du suchst aber den Voice Channel aus!`);
  
        var permissions = voiceChannel.permissionsFor(message.client.user);
  
        if (!permissions.has('CONNECT')) {
  
          return message.channel.send('I cannot connect to your voice channel, make sure I have the proper permissions!');
  
        }
  
        if (!permissions.has('SPEAK')) {
  
          return message.channel.send('I cannot speak in this voice channel, make sure I have the proper permissions!');
  
        }
  
        if (url.match(/^https?:\/\/(www.youtube.com|youtube.com)\/playlist(.*)$/)) {
  
          var playlist = await youtube.getPlaylist(url);
  
          var videos = await playlist.getVideos();
  
          for (const video of Object.values(videos)) {
  
            var video2 = await youtube.getVideoByID(video.id); // eslint-disable-line no-await-in-loop
  
            await handleVideo(video2, message, voiceChannel, true); // eslint-disable-line no-await-in-loop
  
          }
  
          return message.channel.send(`Ich habe wohl keine andere wahl... Ich habe **${playlist.title}** der playlist zugefügt`);
  
        } else {
  
          try {
  
            var video = await youtube.getVideo(url);
  
          } catch (error) {
  
            try {
  
              var videos = await youtube.searchVideos(searchString, 10);
  
              var index = 0;
  
              var videoIndex = 1;
  
              var video = await youtube.getVideoByID(videos[videoIndex - 1].id);
  
            } catch (err) {
  
              console.error(err);
  
              return message.channel.send('Gibt es den Song überhaupt?');
  
            }
  
          }
  
          return handleVideo(video, message, voiceChannel);
  
        }
  
        break;
  
      case "skip":
  
        if (!message.member.voiceChannel) return message.channel.send('Du musst schon in den Voice Channel gehen, baka!');
  
        if (!serverQueue) return message.channel.send('Du musst schon ein song auswählen, baka!');
  
        serverQueue.connection.dispatcher.end('Skip command has been used!');
  
        return undefined;
  
        break;
  
      case "stop":
  
        if (!message.member.voiceChannel) return message.channel.send('Du musst schon in den Voice Channel gehen, baka!');
  
        if (!serverQueue) return message.channel.send('Du musst schon einen Song auswählen, baka');
  
        serverQueue.connection.dispatcher.end('Stop command has been used!');
  
        serverQueue.songs = [];
  
        return undefined;
  
        break;
  
      case "minfo":
  
        if (!serverQueue) return message.channel.send('Ich spiele immer noch nichts!');
  
        return message.channel.send(`ퟎ