Настройте субтитры srt timestamp пакетным способом

У меня есть такой файл субтитров srt

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Paul's letter to the Romans

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it's one of the longest and most significant things

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ever written by the man who was formerly known as Saul of Tarsus.

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He was a Jewish rabbi belonging to a group known as the Pharisees

Он задерживает воспроизведение видео на 2 секунды, Как я могу вычесть 2 секунды из всех отметок времени?