receive audio form a user with discord bot

Question

I'm working on a discord project and in that project i need to record a user voice, i'm following this document.

so far this is what i wrote:

const fs = require('fs');
const Discord = require('discord.js');
const client = new Discord.Client();

client.once('ready', () => {
    console.log('Ready!');
});

client.on('message', async message => {
    if (message.content === 'a' && message.member.voice.channel) {
        const connection = await message.member.voice.channel.join();
        const audio = connection.receiver.createStream('user_id?', { mode: 'pcm' });
        audio.pipe(fs.createWriteStream('user_audio'));
    }
});

client.login('token');

but the problem is that always the user_audio file is empty!

Answer 1

This is a bug in discord.js, to solve this problem we need to play an audio...

const fs = require('fs');
const Discord = require('discord.js');
const client = new Discord.Client();
const { Readable } = require('stream');

const SILENCE_FRAME = Buffer.from([0xF8, 0xFF, 0xFE]);

class Silence extends Readable {
  _read() {
    this.push(SILENCE_FRAME);
    this.destroy();
  }
}

client.once('ready', () => {
    console.log('Ready!');
});

client.on('message', async message => {
    if (message.content === 's' && message.member.voice.channel) {
        const connection = await message.member.voice.channel.join();
        const audio = connection.receiver.createStream(message, { mode: 'pcm', end: 'manual' });
        audio.pipe(fs.createWriteStream('user_audio'));

        connection.play(new Silence(), { type: 'opus' });
        console.log(message.member.user.id);
    }
});

client.login('token');