@damaazzyn/alisaa-js/system/converter.js

All class function for alisa script

const fs = require('fs')
const path = require('path')
const { spawn } = require('child_process')
const { tmpdir } = require('os')
const Func = new (require('./function'))

module.exports = class Converter {
  ffmpeg = (buffer, args = [], ext = '', ext2 = '') => {
    return new Promise(async (resolve, reject) => {
      try {
        let tmp = 'tmp/' + Func.uuid() + '.' + ext
        let out = tmp + '.' + ext2
        await fs.promises.writeFile(tmp, buffer)
        spawn('ffmpeg', [
            '-y',
            '-i', tmp,
            ...args,
            out
          ])
          .on('error', reject)
          .on('close', async (code) => {
            try {
              await fs.promises.unlink(tmp)
              if (code !== 0) return reject(code)
              resolve(await fs.promises.readFile(out))
              await fs.promises.unlink(out)
            } catch (e) {
              reject(e)
            }
          })
      } catch (e) {
        reject(e)
      }
    })
  }
  
  /**
   * Convert Audio to Playable WhatsApp Audio
   * @param {Buffer} buffer Audio Buffer
   * @param {String} ext File Extension 
   */
  toAudio = (buffer, ext) => {
    return this.ffmpeg(buffer, [
      '-vn',
      '-ac', '2',
      '-b:a', '128k',
      '-ar', '44100',
      '-f', 'mp3'
    ], ext, 'mp3')
  }
  
  /**
   * Convert Audio to Playable WhatsApp PTT
   * @param {Buffer} buffer Audio Buffer
   * @param {String} ext File Extension 
   */
  toPTT = (buffer, ext) => {
    return this.ffmpeg(buffer, [
      '-vn',
      '-c:a', 'libopus',
      '-b:a', '128k',
      '-vbr', 'on',
      '-compression_level', '10'
    ], ext, 'opus')
  }
  
  /**
   * Convert Audio to Playable WhatsApp Video
   * @param {Buffer} buffer Video Buffer
   * @param {String} ext File Extension 
   */
  toVideo = (buffer, ext) => {
    return this.ffmpeg(buffer, [
      '-c:v', 'libx264',
      '-c:a', 'aac',
      '-ab', '128k',
      '-ar', '44100',
      '-crf', '32',
      '-preset', 'slow'
    ], ext, 'mp4')
  }
}