if(stream.match(/^\d{4}\.\d{2}(m|\.\d{2}([D|T](\d{2}(:\d{2}(:\d{2}(\.\d{1,9})?)?)?)?)?)/)
      || stream.match(/^\d+D(\d{2}(:\d{2}(:\d{2}(\.\d{1,9})?)?)?)/)
      || stream.match(/^\d{2}:\d{2}(:\d{2}(\.\d{1,9})?)?/)
      || stream.match(/^\d+[ptuv]{1}/))