Film voice over is the process of giving voices in different language for the characters in the language. In this case, the film will already have the audio content or the actors speaking in an other language, whereas the voice over artists must give voices in other preferred languages to get the film released in regions where people speak different language than the originally spoken language in the film. In film dubbing, the voices are given originally for the first time for the actors and other characters in the film. Dubbing is done by professional dubbing artists who give voices for actors and actresses.
More Details – http://vananvoice.com/Film-Dubbing.php