Mass converts entire directory of audio files

massconvert.js

const fs = require('fs');
const exec = require('child_process').execSync;

const files = fs.readdirSync('.').filter(f => f.endsWith('.wav'));

if (!fs.existsSync('./out')) fs.mkdirSync('./out');

files.forEach(file => exec('ffmpeg -i ' + file + ' -c:a libopus -ac 2 ./out/' + file.replace('.wav', '.webm'), {stdio: 'inherit'}));

console.log('########');
console.log('# DONE #');
console.log('########');