FPS mattumbol duration kurayilla....FPS means frames per second....you can change the number of frames per second....increase or decrease....theatreil 24 fps aanu....VCDil oru extra frame add cheyyum making it 25 fps....but duration kurayilla/koodathumilla....example 2 hours ulla movie (7200 seconds) will stay at 7200 seconds....oru secondil ethra frames....athu mathram maarum