A file converted from 24fps to 25fps (PAL) will see the subtitles gradually drift out of sync over time.
The subtitles appear several seconds before or after the dialogue. sone385engsub convert020002 min fixed
Older "converted" files often use outdated codecs (like Xvid or DivX) that modern smart TVs struggle to play without stuttering. How to Fix Subtitle Sync (The "Min Fixed" Method) A file converted from 24fps to 25fps (PAL)