How to synch subtitle and audio in player

In vlc player

press g (or cntrl+g older version) if subtitle appears later
press h (or cntr+h older version) if subtitle appears early

press k (or cntrl+k older version) if audio appears later
press l (or cntrl+l older version) if audio appears later


In KM player


press [(brases key in keyboard) if subtitle appears later
press ] if subtitle appears early