If subtitles are missing
- Check the tracks sidebar before processing: is the intended subtitle present and enabled?
- For automatic external-file discovery, put the subtitle next to the video with the same base name, for example
Example Movie.mkvandExample Movie.srt. - Use a conversion preset if you are adding or changing tracks.
- After processing, explicitly select the subtitle in your player.
- Try a second compatible player to distinguish a file issue from player support or selection.
Text subtitles and bitmap subtitles are different formats. Burned-in subtitles are part of the picture and cannot be enabled, disabled or removed as a separate track.
If timing is wrong
Check the beginning, middle and end. A roughly constant offset can indicate a different opening or starting time. Increasing drift can indicate a timing or frame-rate mismatch. A jump after one scene can indicate a different cut. These are diagnostic clues, not proof of a particular cause.
Prefer a subtitle file for the exact release or cut of your video. If timing needs editing, correct the subtitle with an appropriate subtitle editor, then attach the corrected file and process again. A single offset cannot reliably fix a file whose timing changes throughout.
When contacting support, include the subtitle format, selected language, player, and examples of when the mismatch occurs. State whether it also happens when playing the original with that subtitle.