If you just need a for the whole file (e.g., all subtitles earlier or later by X seconds), here's a common approach:
18;write_to_target_document1a;_5gnuadqxI96EwbkPibGWIA_100;6; 18;write_to_target_document19;_5gnuadqxI96EwbkPibGWIA_20;6; 18;write_to_target_document19;_5gnuadqxI96EwbkPibGWIA_10;6; sone385engsub convert020002 min fixed
To understand how to "fix" a file with this label, we have to break down the likely metadata: If you just need a for the whole file (e
The good news: A fixed offset of exactly 2 minutes is the easiest type of subtitle sync problem to solve. here's a common approach: 18
To permanently embed the corrected subtitles into the MKV:
sone385 — ENGSUB — CONVERT — 020002 — MIN FIXED