submod 
A subtitle(ass/srt) toolkit for modifing synchronization, encoding(TBD), etc.
Install
$ npm install -g submodUsage
submod sync <subtitles> <delta>
Adjust subtitles delay by delta(in seconds), and save to a new file with suffix ".submod".
# Decrease subtitle delay by 134.7 seconds: $ submod sync *S5E01*.ass :-134.7 # Increase subtitle delay by 11.1 seconds: $ submod sync *S5E01*.srt :+11.1