People who like to watch movies probably have encountered such a situation: the cineframe or sound track is not synchronized with the subtitles. Watching films like this is wasting the film itself and our time, and that's really a mental torture at the same time! While don't worry, we can use some software to easily adjust/correct the movie subtitles.
Aegisub (successor of the original SubStation Alpha and Sabbu) is a free, open-source and cross-platform advanced subtitles creating & modifying tool. Recognized as an industry standard of all subtitle editors, it is widely used by numerous subtitle groups and subtitling fans for the subtitling and translation of concert, OP, PV, TV, animation and some other aspects like video post-production.