ffmpeg

Step 1: Download the "Essentials"

If you haven't actually downloaded the files yet:

1. Go to gyan.dev (the standard trusted source for Windows builds).

2. Download the ffmpeg-git-essentials.7z (or .zip).

3. Extract it. You’ll see a folder named bin. Inside that folder are three files: ffmpeg.exe

Step 2: Put it in a "Forever Home"

Don't leave it in your Downloads folder.

1. Create a folder called C:\ffmpeg.

2. Move those 3 files from the bin folder into C:\ffmpeg.

Step 3: Tell Windows Where It Is (The PATH)

This is the part that fixes your PowerShell error:

1. Press the Windows Key and type "Env".

2. Select "Edit the system environment variables".

3. Click the Environment Variables button at the bottom.

4. Under System variables, find the one named Path, select it, and click Edit.

5. Click New and type: C:\ffmpeg

6. Click OK on all three windows.

Step 4: The "Fresh Start"

Crucial: PowerShell won't see the change in the window you already have open.

1. Close your current PowerShell window.

2. Open a new one.

3. Type: ffmpeg -version

If you see a wall of text starting with "ffmpeg version...", you are officially in business.