Why subtitles vanish when you cast, and how to keep them

Cast a film and the subtitles you had on the PC are gone. With AIX Player, the subtitle you choose shows on the TV, whether it is a track inside the file or a separate file such as an SRT. Here is how, and what to check when it does not.

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Windows 11 & 10 · Guide reviewed 28 October 2026

Why subtitles go missing on the TV

A TV shows what it is sent. A subtitle file sitting next to the video on your PC was never part of the video, so a TV cannot find it on its own, and a track inside the file only appears if it is chosen and sent with the picture. AIX Player does that for you: when you cast, the subtitle you chose shows on the TV.

Cast a video with subtitles

1. Check the subtitle on the PC first. Play the video in AIX Player and choose the subtitle from the subtitle menu. A file with the same name as the video loads by itself; any other file loads from the menu.
2. Set a preferred language, if you like. Settings → Casting → Preferred subtitle language is selected automatically when a cast begins.
3. Cast. Select cast, or press T, and choose your TV. The first connection to some TVs needs a one-time step, such as a PIN or the Roku channel.
4. Change it while the film plays, if you need to. Try a supported subtitle change during the cast; if AIX says the track needs a new cast, set its preferred language in Settings → Casting and cast again.

Setup for each TV is in its own guide, from Chromecast to Roku; Cast to TV lists all seven TV families.

Which subtitles reach the TV

Text subtitles such as SRT, ASS and VTT, and picture-based ones such as PGS from Blu-ray rips, whether they are inside the file or loaded from your PC. Two things to know before you start:

• One subtitle at a time. The TV shows one subtitle. The second subtitle track (AIX Pro) is for watching on your PC.
• The look can differ. Your size, colour and outline settings shape the subtitles on the PC. On the TV the text can look different, so judge it from where you sit.

No subtitles on the TV

• Do they show on the PC? If not, the problem is loading, not casting: see subtitles not showing.
• Is a subtitle chosen? Open the subtitle menu and check that a track is selected rather than Off.
• Is it a short forced track? Some tracks only caption a few lines of foreign dialogue. Pick the full track for your language.
• Still nothing? Stop the cast, choose the subtitle on the PC, and cast again.

The wrong language on the TV

Track names come from the file and are sometimes wrong or missing. Play the video on the PC and compare the tracks until you find the right one, then choose it. To have it chosen for you, set Settings → Casting → Preferred subtitle language, which is selected when a cast begins.

Hard to read, or out of time

Subtitles that suit a monitor can look small across a room, so check them on the TV itself rather than trusting the PC. If timing is wrong on the PC too, check the subtitle-delay setting and whether the subtitle matches the video release.

Burn subtitles into a copy first?

There is no need. AIX Player never changes your file, and you do not have to make a copy with the subtitles burned in for the TV: the subtitle you choose shows on the TV during the cast.

Which videos you can cast

These steps are for video files on your PC’s own drives or on a USB or SD drive. Jellyfin, Emby and Plex videos play on your PC; casting media-server videos is not supported. Read about media servers.

Casting is part of AIX Pro: the free app includes 60 casting minutes in total, once, not per session, and Pro makes casting unlimited. Playing supported SDR files on your PC is free with no time limit.