Brio Anti-AutoFocus

This project provides a robust solution to permanently disable autofocus on Logitech Brio cameras and force them to Manual Focus (Infinity). It solves the issue where the camera resets to Autofocus after a reboot or device restart.

Features

• Dual Enforcement: Uses both Windows Registry settings (LVFocusMode, FocusMode) and DirectShow commands to force the camera into Manual Focus mode.
• Persistence: Installs a Windows Scheduled Task that runs at System Startup and User Logon to ensure settings are always applied.
• Device Reset: Automatically restarts the camera driver to ensure settings take effect immediately.
• System-Wide: Installs to C:\ProgramData and runs as the SYSTEM account, making it independent of specific user sessions.

Files

• Setup.ps1: The main installer. Run this to set everything up.
• Uninstall.ps1: Removes the scheduled task and installed files.
• Set-BrioManualFocus.ps1: The core logic script.
• Set-BrioFocusDirectShow.ps1: A helper script that uses DirectShow (C#) to send focus commands.

Installation

1. Download the project files to a folder on your computer.
2. Open PowerShell as Administrator.
3. Navigate to the folder:

   cd "C:\Path\To\BrioAntiAutoFocus"

4. Run the Setup Script:

   .\Setup.ps1

   This will:
   • Create C:\ProgramData\BrioAntiAutoFocus and copy the scripts there.
   • Apply the manual focus settings immediately (your camera will restart briefly).
   • Register the "BrioManualFocus" Scheduled Task.

Uninstallation

To remove the solution:

1. Open PowerShell as Administrator.
2. Run:

   .\Uninstall.ps1

Verification & Troubleshooting

• Logs: The script logs its activity to:

  Get-Content "C:\ProgramData\BrioAntiAutoFocus\BrioFocusLog.txt"

• Task Scheduler: You can find the task named "BrioManualFocus" in the Windows Task Scheduler.
• Manual Run: You can manually trigger the installed script at any time by running:

  & "C:\ProgramData\BrioAntiAutoFocus\Set-BrioManualFocus.ps1"

Customization

To change the manual focus distance (default is 0/Infinity), edit the $Focus value in Set-BrioManualFocus.ps1 before running Setup, or edit the installed file at C:\ProgramData\BrioAntiAutoFocus\Set-BrioManualFocus.ps1.