Transub Player

English | 简体中文 | 日本語 | 한국어

Open a video. Subtitles follow.

Foreign films, dramas, anime — watch first, even without a subtitle file.
Open a video and the picture appears right away; readable subtitles catch up soon after. No more hunting subtitle sites just to keep watching.

Windows desktop player · v1.7.1
Download the installer or portable zip from GitHub or GitCode. You can also use Check for updates inside the app.

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Why Transub Player

Live subtitles while you watch
Subtitles are generated on the fly with built-in speech recognition. Progress stays visible — you can tell it’s working, not hanging.

Translation · Source · Dual — one click
Casual viewing? Switch to translation. Learning? Switch to dual. If translation isn’t ready yet, source subtitles still play — watching never stops.

Chinese / Japanese / Korean / English
Change source and target languages while playing; the file name can help guess the source language. Defaults aim for “understand quickly,” with room to upgrade later.
More languages are planned.

Streams play — and record
Open common network stream URLs directly. Want to rewatch later? Record to local storage in one step.

Scan to play on your phone
Control-bar Wi‑Fi entry plus shared folders; pick files in the phone browser. Live subtitles still come from desktop Whisper / translation — switch translation / source / dual / off on the page. Minimize to tray so LAN and recognition keep running.

Color grade & LUT
Right-click → Color grade: tweak brightness / contrast / saturation and more with live preview, or save named presets. Built-in 3D LUT looks, browse custom .cube / .3dl, or auto-apply a same-stem LUT next to the video.

Deep match with Transub
Generate high-quality subtitles with the Transub subtitle tool; when they’re ready, the player can prompt you to play them.

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Who it’s for

• You want to understand foreign media now — without hunting subtitle sites
• You don’t have ready-made subtitles, and don’t want a heavy workflow just to watch one episode
• You care more about “can I keep watching?” than “is this release-ready subtitle?”

For publish-ready Chinese subtitles, full cleanup, and QC, use the companion product Transub.

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Download & start

1. Get a release from GitHub Releases or GitCode Releases (or use Check for updates in the app):
   • Installer (recommended): TransubPlayer-*-win-x64-setup.exe — next, next, done
   • Portable: TransubPlayer-*-win-x64.zip — unzip and run TransubPlayer.exe
2. If SmartScreen says Windows protected your PC, choose More info → Run anyway
3. Finish the first-run setup wizard (you can associate common video formats)
4. Open or drop a video; if recognition / translation models aren’t installed yet, follow the prompts — then live subtitles start

If a subtitle file already sits next to the video, it loads first; you can switch back to live subtitles anytime.
Installed builds store settings and models under %LocalAppData%\Transub Player\data\; portable builds use data\ next to the exe.

Three steps

1. Open or drop a local video (or open a stream URL)
2. Wait for subtitles, then watch along
3. Switch as needed: translation / source / dual (1 / 2 / 3)

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Shortcuts

Action	Keys
Open	Ctrl+O
Play / Pause	Space · click video
Seek back / forward	← / →
Translation / Source / Dual	1 / 2 / 3
Delay / advance subtitles	Z / X
Show / hide subtitles	V
Playlist	L
Next / Previous	N / P
Fullscreen	F · F11 · Enter · double-click
Screenshot	S
Mute	M
Exit fullscreen	Esc

More options live in the context menu and Settings (UI language, file associations, subtitle look, model install, and more).

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How it works

Layer	Tech
Shell / UI	WPF
Video	mpv
Speech recognition	Built-in Whisper (whisper.cpp / GGML turbo, download on demand)
Translation	llama-server + Hy-MT GGUF (on demand)

Main path: open a local video → readable subtitles ASAP → translation can fall back → quit clean.

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Build from source

Requires Windows + .NET SDK. First run needs network access to fetch mpv and models.

powershell -ExecutionPolicy Bypass -File tools\fetch-mpv.ps1
dotnet run --project src\TransubPlayer\TransubPlayer.csproj

Pack a release (Player + mpv + embedded Whisper; model weights not included). Output goes to artifacts\pack\ (setup + portable zip; Inno Setup 6 is required to build the setup):

powershell -ExecutionPolicy Bypass -File tools\pack-release.ps1
# Portable or setup only:
# powershell -ExecutionPolicy Bypass -File tools\pack-release.ps1 -Target Portable
# powershell -ExecutionPolicy Bypass -File tools\pack-release.ps1 -Target Setup

First recognition: Settings → Models → download whisper turbo.

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System requirements

• Windows 10 / 11 (64-bit)
• Internet required the first time to download recognition / translation models (offline playback afterward for prepared content)
• Optional GPU acceleration (auto or manual); works without a discrete GPU

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Tips

• Subtitles appear slightly behind the picture — normal for live generation
• Goal is “understandable and followable,” not release-grade subtitles
• Without a translation model, source subtitles still work
• On quit, processes started by the player exit together — nothing left running in the background

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Changelog

See CHANGELOG.md (English) · CHANGELOG.zh-CN.md · CHANGELOG.ja.md · CHANGELOG.ko.md

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In one line

Open it. Watch it. Subtitles catch up.