A simple yet useful python script to adjust the subtitle file to get synchronous with the movie by increasing/decresing the subtitle's delay.
Increase delay with 5 seconds:
python pysubtitle.py -i subtitle_file -o new_subtitle_file -s 5
Decrease delay with 5 seconds:
python pysubtitle.py -i subtitle_file -o new_subtitle_file -s 5 -d
Use python pysubtitle.py -h to show detailed manual. Feel free to modify the script to suit your need ^_^.