CuemendSubtitles not showing on the TV
Smart TVs and USB media players are much fussier about subtitle files than VLC. Go through these checks in order – most problems are the first three.
Updated 2026-10-26 · 5 min read
1. File name must match the video
Movie.2019.mkv needs Movie.2019.srt in the same folder. Some TVs also accept Movie.2019.en.srt; many don't. Check for a hidden double extension like .srt.txt.
2. Use SRT
SRT is the most widely supported format. Many TVs ignore ASS/SSA, VTT or SUB files – convert them to SRT (ASS to SRT, VTT to SRT).
3. Encoding
Some TVs need UTF-8, others – especially older models – only display the local Windows code page and show boxes or nothing for UTF-8 (or vice versa). If accents, Hebrew, Arabic, Greek or Cyrillic are broken or the file is ignored, save it once as UTF-8 with BOM and once as the legacy code page (e.g. Windows-1255 for Hebrew) and test both. Cuemend can save either and reports characters that don't fit the code page.
4. Broken timing lines
A single malformed line (missing number, 00:01:02.500 with a dot instead of a comma, overlapping times) can make a strict player drop the whole file. Re-saving through a subtitle tool normalises it. See SRT format.
5. Subtitles inside the MKV
Embedded tracks have to be enabled in the TV's subtitle menu. Image-based tracks (PGS/.sup, VobSub) can't be converted to text without OCR. Text tracks can be extracted to SRT and saved next to the video.
6. Casting and streaming apps
When casting from a phone, the casting app – not the TV – must send the subtitles; many don't. For Plex/Jellyfin, the server may burn in or convert subtitles depending on the client; SRT is the safest.
7. Very long lines or tags
Remove formatting tags and re-wrap long lines (2 lines of ~42 characters is a common guideline). Cuemend's clean-up does both.
Fix the file once, for every player. Cuemend shifts, syncs (also automatically to the film's audio), converts and repairs subtitle files – SRT, VTT, ASS/SSA, SUB, SBV, TTML/DFXP – in your browser. The video and subtitles stay on your computer. Every single-file tool is free; a $7 lifetime license adds one-click auto-sync apply, batch work on many files and two-language subtitles.
Questions and answers
Subtitles show on the computer but not on the TV
Usually the file name, format or encoding – check 1–3.
Can I burn subtitles into the video?
Yes, with a video tool like HandBrake; Cuemend doesn't re-encode video.
Sources and product names: Manufacturer manuals for USB playback (supported subtitle formats); SubRip format conventions. VLC is a trademark of VideoLAN; YouTube is a trademark of Google; other names belong to their owners. Cuemend is independent and not affiliated with them.