This tool shift, stretch and shrink all the time stamps of a SRT subtitle file.
It can be used for synchronizing the subtitles to a movie when there is a constant offset between the subtitles and the movie (this can be the case when the subtitles and the movie come from two different sources), or when there is a time scale difference (for instance if the movie and the subtitle file have different frame rates).
Copy your SRT file to the upper area
( on the SRT file: CTRL-A CTRL-C )
( on the upper text area: CTRL-A CTRL-V )
Write down the original times of the SRT file on the yellow spaces
(there is no need to these times really exist on the SRT file)
Write down the desired new MOVIE times on the yellow spaces
Copy the new SRT file from the bottom text area to your file
( on the bottom text area: CTRL-A CTRL-C )
( on the SRT file: CTRL-A CTRL-V )