This utility resyncs a .srt subtitle file to start at a given time

To use it run

git clone https://github.com/yaronuliel/srt-resync.git
cd srt-resync
chmod +x ./srt-resync.php

And then run

./srt-resync.php START_SECONDS [input] > output.srt

OR

./srt-resync.php START_SECONDS < input.srt > output.srt

Where START_SECONDS is the time of the first subtitle in seconds (e.g. for 00:02:12.032 replace START_SECONDS with 142.032)

the rest of the times in the subtitle file will be set according to the offset between the original start time and the new start time