Update README.md

README.md

@@ -5,6 +5,7 @@ This script extracts chapter information from a Toniebox file, converts it to au
 ## Prerequisites
 
 Ensure you have Python 3 installed on your system.
+FFmpeg must be installed and accessible via the $PATH environment variable.
 
 ## Installation
 
@@ -12,8 +13,7 @@ Ensure you have Python 3 installed on your system.
 
 2. Navigate to the project directory.
 
-3. If you haven't already install ffmpeg using your favorite package manager
-4. Install the required dependencies using `pip`:
+3. Install the required dependencies using `pip`:
     ```bash
     pip install -r requirements.txt
     ```