code: function(ffprobe, cb) {
          if (ffprobe.length) {
            return cb(null, ffprobe);
          }
  
          self._getFfmpegPath(function(err, ffmpeg) {
            if (err) {
              cb(err);
            } else if (ffmpeg.length) {
              var name = utils.isWindows ? 'ffprobe.exe' : 'ffprobe';
              var ffprobe = path.join(path.dirname(ffmpeg), name);
              fs.exists(ffprobe, function(exists) {
                cb(null, exists ? ffprobe : '');
              });
            } else {
              cb(null, '');
            }
          });
        }
docs: Search in the same directory as ffmpeg