wav2mp3

wav2mp3.js

// execute 'brew install lame' before use this script
const fs = require('fs'),
      path = require('path'),
      execSync = require('child_process').execSync,
      srcDir = process.argv[2] || '.',
      dstDir = process.argv[3] || 'mp3';

try{ fs.mkdirSync(dstDir); }catch(e){}

fs.readdir(srcDir, (err, files) => {
    if (err) throw err;
    files
        .filter(f => fs.statSync(f).isFile() && /.*\.wav$/.test(f))
        .map(f => `lame --preset extreme '${f}' '${dstDir}/${path.basename(f, '.wav')}.mp3'`)
        .forEach(cmd => { console.log(cmd); execSync(cmd);});
});