Subtitle Sync

Subtitle Sync for Stremio finds subtitles in your language and times them to the exact file you are playing, using the video's own subtitle track when it can. Subtitles come from OpenSubtitles (a free account is needed), plus Titlovi.com (paid), SubDL, SubSource, Subs.ro (Romanian), AltyaziDB (Turkish), Jimaku (Japanese, for anime and dramas) and TheSubtitleDB if you add them. It fixes a different start, a different speed (25 vs 23.976 fps) or a different cut; before the subtitle menu opens it puts one that lines up on top, and the menu says how each subtitle was timed.

Free AI translation when no subtitle exists in your language. With your own free Google Gemini key (no card), or your own DeepL key (or both, in the order you choose), a subtitle is translated into your language when none of your languages has one: from a subtitle made for your file, a nearly identical language, the film's original language, then English. It is timed the same way, shown on top of the menu, and kept so others get it without a key. More: https://subtitlesync.stream/stremio-ai-subtitles

How to install

1. Open https://subtitlesync.stream/?ref=directory (also in Serbian: https://subtitlesync.stream/sr/, and Brazilian Portuguese: https://subtitlesync.stream/pt-br/).
2. Follow the five guided steps: your languages, your subtitle sources (your own free OpenSubtitles key and login; optional SubDL, SubSource, Subs.ro, AltyaziDB, Jimaku or TheSubtitleDB keys, your Titlovi.com addon link, and a free Gemini key or a DeepL key for the AI translation), how you watch, and install.
3. In Stremio, set your default subtitle language, so the top subtitle turns on by itself.

How the timing works

• TorBox: it follows the video's own subtitle track, found through your TorBox API key or the stream addon you already use (tested: AIOStreams, MediaFusion, StremThru Torz, Meteor).
• Real-Debrid, AllDebrid, Premiumize, Debrid-Link: their rules forbid using your account from a server, so your files there are never read. Subtitles are lined up using OpenSubtitles instead.
• Apps that send no file details (such as Nuvio's phone app): subtitles come as uploaded. Which apps get synced subtitles: https://subtitlesync.stream/stremio-apps-synced-subtitles

What it does not do

It never hosts, finds or links videos, and there is nothing to host or install on a computer: you add one link to Stremio. Free, no ads.

Setup help, subtitle problems and suggestions: https://subtitlesync.stream/discord (Discord) or https://subtitlesync.stream/github (GitHub Discussions) FAQ and contact: https://subtitlesync.stream/help Documentation: https://github.com/AleksaB98/subtitle-sync-for-stremio