Start Screen Recording for iOS error

I`m trying to record my test using appium Start screen recording, which is working fine for Android, but when I try to use with iOS I get the error:
[main] ERROR - An unknown server-side error occurred while processing the command. Original error: ‘ffmpeg’ binary is not found in PATH. Install it using ‘brew install ffmpeg’. Check for more details.

I`ve installed the ffmpeg and updated the $PATH. What else can I do?