I suppose SRT file timing offset is a common problem, however I can't seems to find any simple good tool that works on both Linux and Windows. While most media player on PC should be able to adjust the delays, my TV set-top box could open SRT files but could not adjust timing delays in the subtitle which could be annoying. So, I decided to roll up my sleeves and wrote the little utility python script in a few minutes. Besides, how difficult could a simple format like this http://en.wikipedia.org/wiki/SubRip ? You can download the script from pastie.org: http://pastie.org/1339071 I've released it as free and public domain . Anyone can use it to do anything you like. Anyway, for Windows folks, I have also made and online version by porting it to excellent python script hosting called Utility Mill . Just go to http://utilitymill.com/utility/srt_delay and follow the instructions.