A player’s subtitle-delay control can adjust a text track that has a constant timing offset. First establish whether the captions are early or late and whether that difference remains similar throughout the programme. Do not change audio delay when the picture and sound are already in sync.
Use a clear spoken line
Choose a scene where a visible speaker delivers a short, distinct sentence. Compare when the caption appears with the spoken words, then make a small adjustment. Delay controls use different signs and labels, so read the player’s explanation rather than assuming a positive value always means the same action.
Check more than the opening
Test another scene later in the programme. If the same offset works throughout, a fixed correction may be adequate for that track. If timing gradually drifts or suddenly changes after an advert, recap or cut, the file may not match the video version and a single offset will not solve it.
Keep the correction scoped
Some players remember subtitle delay globally, while others remember it per title. Restore the default before judging another programme. Report the original track, language and approximate offset if it was supplied by the service. A local adjustment can make viewing easier without correcting the source track for other viewers.