HL Player PC Engine

Fast PC Engine Setup

Install the local Windows x64 engine so the PC subtitle page can use native whisper.cpp instead of the browser WASM runtime.

Checking latest setup file...

The smaller default setup file includes CPU and Vulkan. PCs with an NVIDIA GPU can use the NVIDIA GPU (CUDA) setup file for the fastest backend.

Auxiliary Service Notice

Setup files, this download page, model lists, and browser connection support are auxiliary services provided during the support period and may change or end. See the Terms of Service.

What Changes After Setup

The setup file installs the engine files, native whisper.cpp binaries, browser launch protocol, and Edge/Chrome local engine access policy values for the current Windows user. Official support is Microsoft Edge and Google Chrome on Windows x64.

User Setup

  1. Click Download Windows x64 setup file.
  2. If Edge/Chrome blocks the download, open the downloads list and keep the file only when you are intentionally testing this package.
  3. Run the downloaded HLPlayer-PC-Engine-Setup-vX.Y.Z.exe file.
  4. When setup finishes, fully quit Edge/Chrome, open it again, and return to the same PC subtitle page.
  5. If the page still cannot detect the engine, reboot Windows once and try the same page again.

The setup file is downloaded from the latest release path in latest.json. To remove the engine, use Windows Apps & Features, Control Panel, or the Start menu uninstall shortcut.

Items Registered During Setup

The install path is %LOCALAPPDATA%\HL Player\PcEngine. The engine only binds to 127.0.0.1:17321 and processes selected audio on the user's PC.

Protocol
hlplayer-engine://start
HKCU\Software\Classes\hlplayer-engine

Browser policy values
HKCU\Software\Policies\Google\Chrome\LoopbackNetworkAllowedForUrls
HKCU\Software\Policies\Google\Chrome\LocalNetworkAccessAllowedForUrls
HKCU\Software\Policies\Microsoft\Edge\LoopbackNetworkAllowedForUrls
HKCU\Software\Policies\Microsoft\Edge\LocalNetworkAccessAllowedForUrls

Launch command
powershell.exe -NoProfile -ExecutionPolicy Bypass -WindowStyle Hidden

The uninstaller removes the install directory, Start menu shortcuts, hlplayer-engine://start protocol registration, and Edge/Chrome policy values created by HL Player.

Download Warning

This setup file contains Windows executables. Until latest.json reports installerSigned: true, treat it as an internal/test build. Production distribution should use an Authenticode-signed setup executable.

For internal testing, compare the SHA-256 below with the setup file you downloaded.

Setup file SHA-256: checking latest.json... Signing state: checking latest.json...

Troubleshooting

If the subtitle page still says Install required, click Launch engine once on the PC subtitle page. If it still fails, fully restart Edge/Chrome, return to the same page, then reboot Windows once before trying again.

Developer Build Information 
.\pc_engine\windows\build-installer.ps1

This script builds a single Inno Setup executable with the engine and whisper.cpp Windows x64 backend binaries. The engine auto-selects CUDA, Vulkan, then CPU when matching payloads are available. With a code signing certificate, pass -CodeSignCertThumbprint to sign the setup, generated uninstaller, and engine. Public release builds must also pass -PublicRelease.