This explains how to install the full build of FFmpeg on Windows 11, and how to add it to the system PATH so that ffmpeg, ffprobe, and ffplay can be used from any terminal or external application.

What You Get
With a proper full installation you will have:
ffmpeg.exe – main tool for audio/video conversion and processing
ffprobe.exe – tool for inspecting media files (codecs, streams, metadata, etc.)
ffplay.exe – simple media player based on FFmpeg
Once installed and added to PATH, you can run:

ffmpeg -version
ffprobe -version
ffplay -version

from any Command Prompt / PowerShell window.

1. Download FFmpeg Full Build
Open your browser and go to the official FFmpeg website:
https://ffmpeg.org → Download → Windows
In the Windows builds section, choose a trusted build provider, for example:
Gyan FFmpeg Builds (attached in this post)
or BtbN Builds
Download a 64-bit full build (often called full_build or similar), usually a .zip file, e.g.:
ffmpeg-7.x-full_build.zip
Once the download finishes, extract the .zip file. You should see something like:

2. Choose an Installation Folder
Do not leave FFmpeg inside Downloads. Instead, move it to a stable location, for example:
C:\ffmpeg or
C:\Program Files\ffmpeg

Example
Create the folder: C:\ffmpeg
Move the extracted content into C:\ffmpeg, so that you have:

3. Add FFmpeg to the PATH (Windows 11)
To use ffmpeg from any Command Prompt / PowerShell window, you must add its bin folder to the PATH environment variable.

3.1 Open Environment Variables
You can do this in two ways.

Method A – via Start menu
Press Win and type: env
Click “Edit the system environment variables”.
In the System Properties window, click “Environment Variables…”.
Method B – via Settings
Press Win + I to open Settings.
Go to System → About.
Click “Advanced system settings”.
Click “Environment Variables…”.

3.2 Add the
You can add FFmpeg to:
User variables (only your user account can use it), or
System variables (all accounts can use it – requires admin rights).
Here is the typical way using User variables:
In the Environment Variables window, in the top section “User variables for ”, locate Path.
Select Path and click “Edit…”.
In the Edit environment variable window:
Click OK on all open dialog windows to save the changes.
Click “New”
Add the path to FFmpeg’s bin folder, for example: C:\ffmpeg\bin

4. Verify the Installation
Close all existing terminal windows (Command Prompt, PowerShell, Windows Terminal, etc.).
Open a new Command Prompt:
Press Win, type cmd, and press Enter.
Run: ffmpeg -version
If everything is configured correctly, you should see FFmpeg version information, something like:

You can also test:


to confirm those tools are available too.

5. Common Issues & Fixes
5.1
If you see:

Double-check you added the correct pathto the Path variable, e.g.:
C:\ffmpeg\bin
Make sure you clicked OK on all windows after editing Path.
Close and reopen the terminal window.
If you had multiple FFmpeg installations, ensure the correct path is present and at the top of the list.

5.2 Multiple FFmpeg Versions in PATH
If you had older FFmpeg installations (e.g. C:\Program Files\ffmpeg-old\bin), Windows might use the first entry in Path.

To clean this up:
Open Environment Variables again.
Edit Path and remove any obsolete FFmpeg entries.
Keep only the path you want, e.g.: C:\ffmpeg\bin
Optionally, move this entry to the top of the list.

Using FFmpeg in Your Own Apps
Once FFmpeg is in PATH, any application can call it just by using the command name ffmpeg without needing a hard-coded full path.

Example: Python (subprocess)
This will work as long as FFmpeg is installed and the PATH is configured correctly.

7. Uninstall or Move FFmpeg
If you want to move or remove FFmpeg:

Remove its entry from the Path environment variable.
Delete or move the C:\ffmpeg folder (or whichever folder you used).
Restart your terminal. Running ffmpeg -version should now fail, confirming it is removed.

8. License
FFmpeg is licensed under the LGPL/GPL (depending on how it is built and which libraries are included). For detailed licensing information, see:

https://ffmpeg.org/legal.html
When redistributing FFmpeg binaries or using it in your software, make sure you comply with the relevant licenses.

THANK YOU! Option 2 did the trick.

You would normally see "Test Mode" like that when disabling driver signature enforcement. You can just enable it again. A reboot should automatically disable the driver signature bypass. If not, try this.
Reboot your PC and hit F7 (might differ depending on your board manufacturer) during the boot progress.
Click/tap on Troubleshoot on the Choose an option screen at boot.
Click/tap on Advanced options in Troubleshoot options.
Click/tap on Startup Settings in Advanced options.
Click/tap on the Restart button in Startup Settings.
When the computer restarts into Startup Settings, press the 7 or F7 key to Disable/enable driver signature enforcement.
Option 2
Enable or Disable Driver Signature Enforcement in Command Prompt
It is required to disable Secure Boot if you get the error message below while trying to enable Test Mode.
An error has occurred setting the element data. The value is protected by Secure Boot policy and cannot be modified or deleted.Open an command prompt in admin mode.

Copy and paste the command you want to use below into the elevated command prompt, and press Enter.
Enable driver signature enforcement - DEFAULT
bcdedit /set nointegritychecks off
OR
Disable driver signature enforcement
bcdedit /set nointegritychecks on
Reboot your PC.

I use Windows 11 Home on my PC.
Today I see "Test Mode Windows 11 Home Build 26100.ge_release.240331-1435" in the lower right-hand corner of my display. Have never had this message before.

And thanks for the fast reply!

Thank you so much, that was it. The privileged setting was not ticked in.

Hi AshleywaL,
A few common mistake on Mumble is not have certain settings activated.
Make sure that under your Shortcut settings:
Enable shortcuts in privileged applications
Enable XInput
Are turned on. The first one especially since it allows Mumble to use your keys and not being taken over by other software.
Start there, this is the most common issue I've seen.

Guys, my Mumble isn't picking up my ptt button but my mic is working just fine. Any ideas what is going on?