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• MoviePy Create Video that keeps audio on Twitter

  26 janvier 2019, par SDS

  I’m exporting lots of videos and was planning to use them on Twitter.

  When I read the documentation the first time I (foolishly) thought I only had to worry about the dimensions and the rest would take care of itself.

  I have many files that look and play great on my PC but as soon as I load them into Twitter there is no audio.
  Twitter’s Media Best Practices are located here :

  Recommended Video Codec: H264 High Profile
  
  Recommended Frame Rates: 30 FPS, 60 FPS
  
  Recommended Video Resolution: 1280x720 (landscape), 720x1280 (portrait), 720x720 (square)
  
  Recommended Minimum Video Bitrate: 5,000 kbps
  
  Recommended Minimum Audio Bitrate: 128 kbps
  
  Recommended Audio Codec: AAC LC
  
  Recommended Aspect Ratio: 16:9 (landscape or portrait), 1:1 (square)
  
  Advanced:
  
  
  
  Frame rate must be 60 FPS or less
  
  Dimensions must be between 32x32 and 1280x1024
  
  File size must not exceed 512 mb
  
  Duration must be between 0.5 seconds and 140 seconds
  
  Aspect ratio must be between 1:3 and 3:1
  
  Must have 1:1 pixel aspect ratio
  
  Only YUV 4:2:0 pixel format is supported
  
  Audio must be AAC with Low Complexity profile. High-Efficiency AAC is not supported
  
  Audio must be mono or stereo, not 5.1 or greater
  
  Must not have open GOP
  
  Must use progressive scan

  Here’s the specs on a specific video :

  Video ----
  
  Length: 00:00:12
  
  Frame width 1280
  
  Frame height 720
  
  Data rate 238kbps
  
  Total bitrate 368kbps
  
  Frame rate 24.00 frames/second
  
  Audio --
  
  Bit rate 129 kbps
  
  Channels 2 (stereo)
  
  Audio sample rate 44.100 kHz
  
  File --
  
  Size 551 KB
  
  Item type MP4 File

  The code is fairly straightforward. I grab an image and make a short intro frame with it, then add two short clips and put it all together as you can see here :

  image_clip = ImageClip(my_image)   image_clip.set_duration(seconds).write_videofile('F:/sm_Temp_Files/trash_%s.mp4' % fname,fps=24)
  
  image_video_clip = mpy.VideoFileClip('F:/sm_Temp_Files/trash_%s.mp4' % fname)
  
  video_path = (my_video_path)
  
  video_clip = mpy.VideoFileClip(video_path, target_resolution = (h,w),audio=True)
  
  outro_clip = mpy.VideoFileClip('Logo_Intro_w_Stinger_Large.mp4',target_resolution = (h,w),audio=True)
  
  clips = [image_video_clip,video_clip,image_video_clip,video_clip,image_video_clip,outro_clip]
  
  slided_clips = [CompositeVideoClip([clip.fx( transfx.crossfadein, transition_seconds)]) for clip in clips]
  
  c = concatenate_videoclips(slided_clips)                
  
  c.write_videofile('F:/sm_Short_Video/sm_%s.mp4' % fname,fps=24)

  I’ll admit, I’m out of my league to know what to do next. When Googling it looks like others have had similar issues but show fixes in FFMpeg, like this example.

  Yes, I know MoviePy is written on top of FFMpeg but for a novice like me it would be really nice if there was tweaks I could do inside of MoviePy to get the audio to work on Twitter.

  Thank you in advance !

• Need Help Making Java Script Discord Music Bot

  22 octobre 2018, par Gambino

  I have tried to use this code to make a discord music bot but i am getting error telling me i need ffmpeg, but how would I implement it into this code ?

  index.js file

  const Discord = require('discord.js');
  
  const bot = new Discord.Client();
  
  const config = require("./config.json");
  
  const ytdl = require('ytdl-core');
  
  
  
  var youtube = require('./youtube.js');
  
  
  
  
  
  var ytAudioQueue = [];
  
  var dispatcher = null;
  
  
  
  bot.on('message', function(message) {
  
      var messageParts = message.content.split(' ');
  
      var command = messageParts[0].toLowerCase();
  
      var parameters = messageParts.splice(1, messageParts.length);
  
  
  
      switch (command) {
  
  
  
          case "-join" : 
  
          message.reply("Attempting to join channel " + parameters[0]);
  
          JoinCommand(parameters[0], message);
  
          break;
  
      
  
          case "-play" :
  
          PlayCommand(parameters.join(" "), message);
  
          break;
  
  
  
          case "-playqueue":
  
          PlayQueueCommand(message);
  
          break;
  
      }
  
  });
  
  
  
  
  
      function PlayCommand(searchTerm) {
  
          if(bot.voiceConnections.array().length == 0) {
  
              var defaultVoiceChannel = bot.channels.find(val => val.type === 'voice').name;
  
              JoinCommand(defaultVoiceChannel);
  
          }
  
          youtube.search(searchTerm, QueueYtAudioStream);
  
      }
  
  
  
      function PlayQueueCommand(message) {
  
          var queueString = "";
  
  
  
          for(var x = 0; x < ytAudioQueue.length; x++) {
  
              queueString += ytAudioQueue[x].videoName + ", ";
  
          }
  
          queueString = queueString.substring(0, queueString.length - 2);
  
          message.reply(queueString);
  
      }
  
  
  
      function JoinCommand(ChannelName) {
  
          var voiceChannel = GetChannelByName(ChannelName);
  
  
  
          if (voiceChannel) {
  
              voiceChannel.join();
  
              console.log("Joined " + voiceChannel.name);
  
          }
  
          
  
          return voiceChannel;
  
          
  
      }
  
  
  
      /* Helper Methods */
  
  
  
      function GetChannelByName(name) {
  
          var channel = bot.channels.find(val => val.name === name);
  
          return channel;
  
      }
  
  
  
    
  
  
  
      function QueueYtAudioStream(videoId, videoName) {
  
          var streamUrl = youtube.watchVideoUrl + videoId;
  
  
  
          if (!ytAudioQueue.length) {
  
              ytAudioQueue.push(
  
                  {
  
                      'streamUrl' : streamUrl,
  
                      'videoName' : videoName
  
                  }
  
              );
  
              console.log('Queued audio ' + videoName);
  
              PlayStream(ytAudioQueue[0].streamUrl);
  
          }
  
          else {
  
              ytAudioQueue.push(
  
                  {
  
                      'streamUrl' : streamUrl,
  
                      'videoName' : videoName
  
                  }
  
              );
  
          }
  
          console.log("Queued audio " + videoName);
  
      }
  
  
  
      function PlayStream(streamUrl) {
  
          const streamOptions = {seek: 0, volume: 1};
  
  
  
          if (streamUrl) {
  
              const stream = ytdl(streamUrl, {filter: 'audioonly'});
  
  
  
              if (dispatcher == null) {
  
                  var voiceConnection = bot.voiceConnections.first();
  
  
  
                  if(voiceConnection) {
  
                      console.log("Now Playing " + ytAudioQueue[0].videoname);
  
                      dispatcher = bot.voiceConnections.first().playStream(stream, streamOptions);
  
  
  
                      dispatcher.on('end', () => {
  
                          dispatcher = null;
  
                          PlayNextStreamInQueue();
  
                      });
  
  
  
                      dispatcher.on('error', (err) => {
  
                          console.log(err);
  
                      });
  
                  }
  
              } else {
  
                  dispatcher = bot.voiceConnections.first().playStream(stream, streamOptions);
  
              }
  
              
  
          }
  
      }
  
  
  
      function PlayNextStreamInQueue() {
  
          ytAudioQueue.splice(0, 1);
  
  
  
          if (ytAudioQueue.length != 0) {
  
              console.log("now Playing " + ytAudioQueue[0].videoName);
  
              PlayStream(ytAudioQueue[0].streamUrl);
  
          }
  
      }
  
  
  
  
  
  bot.login(config.token);

  youtube.js file

  var request = require('superagent');
  
  
  
  const API_KEY = "My API KEY";
  
  const WATCH_VIDEO_URL = "https://www.youtube.com/watch?v=";
  
  
  
  exports.watchVideoUrl = WATCH_VIDEO_URL;
  
  
  
  exports.search = function search(searchKeywords, callback) {
  
    var requestUrl = 'https://www.googleapis.com/youtube/v3/search' + '?part=snippet&q=' + escape(searchKeywords) + '&key=' + API_KEY;
  
  
  
    request(requestUrl, (error, response) => {
  
      if (!error && response.statusCode == 200) {
  
  
  
        var body = response.body;
  
        if (body.items.length == 0) {
  
          console.log("I Could Not Find Anything!");
  
          return;
  
        }
  
        for (var item of body.items) {
  
          if (item.id.kind == 'youtube#video') {
  
            callback(item.id.videoId, item.snippet.title);
  
            return;
  
          }
  
        }
  
      } else {
  
        console.log("Unexpected error!");
  
        return;
  
      }
  
    });
  
  
  
    return;
  
  
  
  };

  Error I am getting when I try to run code :

  Joined General

  C :\Discord Bot\node_modules\discord.js\src\client\voice\pcm\FfmpegConverterEngine.

  js:80

  throw new Error(

  ^

  Error : FFMPEG was not found on your system, so audio cannot be played. Please make
  sure FFMPEG is installed and in your PATH.

• Adding chapters to MP4 files, and being identified on iOS 12 podcast app

  5 avril 2019, par Craig Francis

  I have an MP4 file, where I’ve added chapters via ffmpeg.

  But in the iOS 12 Podcasts app, from Apple, the chapters don’t appear. This should happen, as noted by idownloadblog.com

  

  In comparison, when using QuickLook on MacOS, the list of chapters can be seen by clicking the chapters button (in the bottom right hand side of the window).

  

  And opening in QuickTime Player, while there isn’t a list of chapters to view, you can use the "View > Next Chapter" menu item.

  So I’m assuming this is a bug in iOS... but I’m wondering if there is another way to add chapters ? or if I’ve made a mistake ?

  ---

  My current process is to create a "ffmetadata" file, as noted in the ffmpeg documentation :

  ;FFMETADATA1
  
  title=Example
  
  
  
  [CHAPTER]
  
  TIMEBASE=1/1000
  
  START=0
  
  END=221913
  
  title=Chapter 1
  
  
  
  [CHAPTER]
  
  TIMEBASE=1/1000
  
  START=221913
  
  END=1169241
  
  title=Chapter 2

  https://ffmpeg.org/ffmpeg-formats.html#Metadata-1

  Then I’ve tried each of the following commands :

  ffmpeg -i 2019-01-02.mp4 -i 2019-01-02.meta -map_metadata 1 -codec copy 2019-01-02-chapters.mp4
  
  ffmpeg -i 2019-01-02.mp4 -i 2019-01-02.meta -map_metadata 1 2019-01-02-chapters.mp4
  
  ffmpeg -i 2019-01-02.mp4 -i 2019-01-02.meta -map_metadata 1 2019-01-02-chapters.mp3

  • The first one is from the ffmpeg documentation, where -codec copy means the audio file is not re-encoded.
  • The second one takes longer, while it re-encodes the audio data.
  • The third one requires re-encoding to convert it into an MP3 file (which uses ID3 tags for the chapter data).

  ---

  On a slightly unrelated note, the third party app "RSSRadio" does list the chapters, but the feature added in version 4 that allows you to "skip directly to the start of the next chapter", if the next chapter starts within the next 3 minutes, does not seem to work.