Recherche avancée

Sur d’autres sites (3354)

• avcodec : add DFPWM1a codec

  8 mars 2022, par Jack Bruienne

  avcodec : add DFPWM1a codec
  From the wiki page (https://wiki.vexatos.com/dfpwm) :
  
  > DFPWM (Dynamic Filter Pulse Width Modulation) is an audio codec
  
  > created by Ben “GreaseMonkey” Russell in 2012, originally to be used
  
  > as a voice codec for asiekierka's pixmess, a C remake of 64pixels.
  
  > It is a 1-bit-per-sample codec which uses a dynamic-strength one-pole
  
  > low-pass filter as a predictor. Due to the fact that a raw DPFWM decoding
  
  > creates a high-pitched whine, it is often followed by some post-processing
  
  > filters to make the stream more listenable.
  It has recently gained popularity through the ComputerCraft mod for
  
  Minecraft, which added support for audio through this codec, as well as
  
  the Computronics expansion which preceeded the official support. These
  
  both implement the slightly adjusted 1a version of the codec, which is
  
  the version I have chosen for this patch.
  This patch adds a new codec (with encoding and decoding) for DFPWM1a.
  
  The codec sources are pretty simple : they use the reference codec with
  
  a basic wrapper to connect it to the FFmpeg AVCodec system.
  To clarify, the codec does not have a specific sample rate - it is
  
  provided by the container (or user), which is typically 48000, but has
  
  also been known to be 32768. The codec does not specify channel info
  
  either, and it's pretty much always used with one mono channel.
  
  However, since it appears that libavcodec expects both sample rate and
  
  channel count to be handled by either the codec or container, I have
  
  made the decision to allow multiple channels interleaved, which as far
  
  as I know has never been used, but it works fine here nevertheless. The
  
  accompanying raw format has a channels option to set this. (I expect
  
  most users of this will not use multiple channels, but it remains an
  
  option just in case.)
  This patch will be highly useful to ComputerCraft developers who are
  
  working with audio, as it is the standard format for audio, and there
  
  are few user-friendly encoders out there, and even fewer decoders. It
  
  will streamline the process for importing and listening to audio,
  
  replacing the need to write code or use tools that require very
  
  specific input formats.
  You may use the CraftOS-PC program (https://www.craftos-pc.cc) to test
  
  out DFPWM playback. To use it, run the program and type this command :
  
  "attach left speaker" Then run "speaker play <file.dfpwm>" for each file.
  
  The app runs in a sandbox, so files have to be transferred in first ;
  
  the easiest way to do this is to simply drag the file on the window.
  
  (Or copy files to the folder at https://www.craftos-pc.cc/docs/saves.)
  Sample DFPWM files can be generated with an online tool at
  
  https://music.madefor.cc. This is the current best way to encode DFPWM
  
  files. Simply drag an audio file onto the page, and it will encode it,
  
  giving a download link on the page.
  I've made sure to update all of the docs as per Developer§7, and I've
  
  tested it as per section 8. Test files encoded to DFPWM play correctly
  
  in ComputerCraft, and other files that work in CC are correctly decoded.
  
  I have also verified that corrupt files do not crash the decoder - this
  
  should theoretically not be an issue as the result size is constant with
  
  respect to the input size.
  Signed-off-by : Jack Bruienne <jackbruienne@gmail.com>
  

  • [DH] Changelog
  • [DH] MAINTAINERS
  • [DH] doc/general_contents.texi
  • [DH] libavcodec/Makefile
  • [DH] libavcodec/allcodecs.c
  • [DH] libavcodec/codec_desc.c
  • [DH] libavcodec/codec_id.h
  • [DH] libavcodec/dfpwmdec.c
  • [DH] libavcodec/dfpwmenc.c
  • [DH] libavcodec/utils.c
  • [DH] libavcodec/version.h

• Why does My Discord bot stop playing music

  27 septembre 2021, par Konglnwza

  So My Discord bot will be able to play music for a while then it will stop and i have to restart the bot to fix it.
And if it stopped then i use command skip it will crash the bot with the errors below

  


  C:\Users\User\Desktop\Discord bot\Song\play.js:96&#xA;    server_queue.connection.dispatcher.end();&#xA;                                       ^&#xA;&#xA;TypeError: Cannot read property &#x27;end&#x27; of null&#xA;    at skip_song (C:\Users\User\Desktop\Discord bot\Song\play.js:96:40)&#xA;    at Object.execute (C:\Users\User\Desktop\Discord bot\Song\play.js:65:47)&#xA;    at Client.<anonymous> (C:\Users\User\Desktop\Discord bot\bot.js:78:74)&#xA;    at Client.emit (node:events:394:28)&#xA;    at MessageCreateAction.handle (C:\Users\User\Desktop\Discord bot\node_modules\discord.js\src\client\actions\MessageCreate.js:31:14)&#xA;    at Object.module.exports [as MESSAGE_CREATE] (C:\Users\User\Desktop\Discord bot\node_modules\discord.js\src\client\websocket\handlers\MESSAGE_CREATE.js:4:32)&#xA;    at WebSocketManager.handlePacket (C:\Users\User\Desktop\Discord bot\node_modules\discord.js\src\client\websocket\WebSocketManager.js:384:31)&#xA;    at WebSocketShard.onPacket (C:\Users\User\Desktop\Discord bot\node_modules\discord.js\src\client\websocket\WebSocketShard.js:444:22)&#xA;    at WebSocketShard.onMessage (C:\Users\User\Desktop\Discord bot\node_modules\discord.js\src\client\websocket\WebSocketShard.js:301:10)&#xA;    at WebSocket.onMessage (C:\Users\User\Desktop\Discord bot\node_modules\ws\lib\event-target.js:132:16)&#xA;</anonymous>

  


  I guess the problem is something with ffmpeg or i must have some npms more.

  


  npm i already installed

  


  

  • discord.js

  


  • ytdl-core

  


  • ytdl-search
and also i already installed ffmpeg in my computer and set the path

  


  


  i want to ask that do i have to install any npms more ? or anyone know how to fixed this problem ?

  


  const ytdl = require('ytdl-core');
const ytSearch = require('yt-search');

const queue = new Map();

module.exports = {
    name: 'play',
    aliases: ['skip', 'stop', 'queue', 'leave', 'join'],
    description: 'Joins and play',
    async execute(message, args , cmd, client, Discord){
        const voice_channel = message.member.voice.channel;
        if(!voice_channel) return message.channel.send('เข้าไปอยู่ในดิสก่อนดิวะ :angry: ');//you must in voice channel
        
        
        const server_queue = queue.get(message.guild.id);
        if(cmd==='play' || cmd==='p'){
            if(!args.length) return message.channel.send('จะเปิดอะไรล่ะพี่ :triumph:');//you must have argument
            let song = {};

            if(ytdl.validateURL(args[0])){
                const song_info = await ytdl.getInfo(args[0]);
                song = {title: song_info.videoDetails.title, url: song_info.videoDetails.video_url}
            } else {
                const videoFinder = async (query) => {
                    const videoResult = await ytSearch(query);
                    return (videoResult.videos.length > 1) ? videoResult.videos[0] : null;
                }

                const video = await videoFinder(args.join(' '));
                if(video){
                    song = {title: video.title, url: video.url}
                
                } else{
                    message.channel.send('หาไม่เจอ :cry: ');//cant find song
                }
            }
            //const connection = await voiceChannel.join(); 
            if(!server_queue){
                const queue_constructor = {
                    voice_channel: voice_channel,
                    text_channel: message.channel,
                    connection: null,
                    songs: []
                }

                queue.set(message.guild.id, queue_constructor);
                queue_constructor.songs.push(song);

                try{
                    const connection = await voice_channel.join();
                    queue_constructor.connection = connection;
                    video_player(message.guild, queue_constructor.songs[0]);
                } catch (err) {
                    queue.delete(message.guild.id);
                    message.channel.send('error');
                    throw err;
                }
            } else{
                server_queue.songs.push(song);
                return message.channel.send(`:regional_indicator_k: :regional_indicator_o: :regional_indicator_n: :regional_indicator_g: :star_struck: **${song.title}** ใส่เข้าคิวแล้ว`)//added to queue
            }
            

        }
        else if(cmd === 'skip' || cmd ==='s') skip_song(message, server_queue);
        else if(cmd === 'clear' || cmd==='c') clear_song(message, server_queue);
        else if(cmd === 'join') join_song(message);
        else if(cmd === 'leave') leave_song(message);
        else if(cmd === 'queue' || cmd ==='q') queue_show(message,server_queue,Discord);


    }
}

const video_player = async (guild, song) => {
    const song_queue = queue.get(guild.id);

    if(!song){
        //song_queue.text_channel.send('ไปละบาย :kissing_heart: ');
        song_queue.voice_channel.leave();
        queue.delete(guild.id);
        return;
    }
    const stream = ytdl(song.url,{filter: 'audioonly'},{ highWaterMark: 1<<25 });
    song_queue.connection.play(stream, { seek: 0, volume: 0.5 })
    .on('finish', () => {
        song_queue.songs.shift();
        video_player(guild, song_queue.songs[0]);
    });
    await song_queue.text_channel.send(`:regional_indicator_k: :regional_indicator_o: :regional_indicator_n: :regional_indicator_g: :sunglasses: กำลังเล่นเด็ก ***${song.title}***`);//playing song
}

const skip_song = (message, server_queue) => {
    if(!message.member.voice.channel) return message.channel.send('เข้าดิสก่อนดิ :angry: ');//you must be in voice channel
    if(!server_queue) return message.channel.send('ไม่มีเพลงในคิวแล้ว :relieved: ');//no song in queue
    server_queue.connection.dispatcher.end();
}

const clear_song = (message, server_queue) => {
    if(!message.member.voice.channel) return message.channel.send('เข้าดิสก่อนดิ :angry: ');//you must be in voice channel
    if(!server_queue) return message.channel.send('ไม่มีเพลงในคิวแล้ว :relieved: ');//no song in queue
    server_queue.songs = [];
    server_queue.connection.dispatcher.end();
}

const join_song = (message) => {
    if(!message.member.voice.channel) return message.channel.send('เข้าดิสก่อนดิ :angry: ');//you must be in voice channel
    message.member.voice.channel.join();
}

const leave_song = (message) => {
    if(!message.member.voice.channel) return message.channel.send('เข้าดิสก่อนดิ :angry: ');//you must be in voice channel
    message.member.voice.channel.leave();
}

const queue_show =  (message,server_queue,Discord) => {
    if(!server_queue) return message.channel.send('ไม่มีเพลงในคิวแล้ว :relieved: ');//no song in queue
    const queueList = server_queue.songs.map((song, i) => `[${++i}] - ${song.title}`);
    const queueEmbed = new Discord.MessageEmbed()
    .setDescription(queueList);
    message.channel.send(queueEmbed);
}```


  


• Completely remove high frequencies from wav file with ffmpeg

  21 septembre 2021, par Melvin Bender

  For my speech recognition project, I'd like to completely cut off frequencies above 5000Hz on my wav files using ffmpeg.
I understand there is a lowpass filter for reducing frequencies above a certain value :

  


  ffmpeg -i original.wav -af "lowpass=f=5000" lowpass.wav


  


  However when I check the spectogram, it seems like frequencies above 5000 have been reduced, not completely cut off

  


  Voice sample with 5000Hz filter

  


  How can I completely cut off frequencies with ffmpeg ? Any other software is also fine.