AI Sub Video Player

Got a video with no subtitles? AI Sub Video Player listens to the dialogue and writes subtitles for it, right on your phone. It can also translate them: into English, or into more than 50 other languages. Nothing you watch is uploaded.

AI SUBTITLES, MADE ON YOUR DEVICE

• Tap "Generate subtitles" on any video with speech.

• Lines appear as they're written, so you can start watching straight away.

• Keep subtitles in the language being spoken, or translate them into English.

• Or translate them into more than 50 other languages, such as Hindi, Tamil, Bengali or Spanish, right on your phone. Each language is a one-time download of about 30 MB, and the app asks before downloading.

• The spoken language is detected automatically. If it guesses wrong, choose it yourself from around 100 languages.

• Subtitles are saved, so they're ready the next time you open the video.

• Watching a series? Turn on "Auto-subtitle the next video" and the next episode's subtitles are made in the background while you finish this one.

• Speech recognition runs entirely on your phone. Your videos never leave it.

CHOOSE THE SPEECH MODEL THAT SUITS YOUR PHONE

Download one of three Whisper speech models once, then generate subtitles without a connection:

• Whisper Tiny (32 MB): fastest, best with clear speech.

• Whisper Base (60 MB): balanced speed and accuracy, a good default for most phones.

• Whisper Small (190 MB): most accurate, slower on older devices.

Downloads pick up where they left off if your connection drops, and you can delete a model at any time.

PICK UP WHERE YOU LEFT OFF

• Videos resume where you stopped, with "Start over" one tap away.

• Continue watching from the top of your library, and see how far you got in every folder.

• Watch history shows what you watched and when. Remove a video from it, with undo, or clear it all.

• When a video ends, the next one in the folder starts after a short countdown, or skip to it any time.

A PLAYER THAT STAYS OUT OF THE WAY

• Swipe up or down to change volume and brightness, and sideways to seek.

• Double-tap to skip 10 seconds forward or back.

• Playback speed from 0.5× to 2×.

• Fit, Fill or Stretch the picture to your screen.

• Choose subtitle tracks already inside the video.

• Dark by design, for watching in dim rooms. The screen stays on while you watch.

YOUR VIDEOS, ORGANISED BY FOLDER

• Add the folders where you keep videos. Every video inside them, subfolders included, shows up in your library.

• Or pick a few videos and group them into a folder of your own, without moving any files.

• Episodes sort the way you'd expect: Episode 2 comes before Episode 10.

• New videos appear the next time you open a folder.

• Removing a folder or a video from your library never deletes anything from your phone.

IN YOUR LANGUAGE

The app follows your phone's language and is available in English, Arabic, Chinese (Simplified), French, German, Hindi, Indonesian, Japanese, Korean, Portuguese and Spanish.

Subtitle accuracy depends on the audio: clear dialogue gives the best results, while heavy music, background noise or strong accents can cause mistakes. Translations carry those mistakes over.

Screenshots show footage from "Tears of Steel" © Blender Foundation | mango.blender.org, licensed under CC BY 3.0.