ffmpeg local expansion and ruing a command within

Big time n00b question.. I just can't quite figure out what I'm doing wrong. Here is my .bat file:

@ECHO OFF

SETLOCAL

set /p Input= Drop file here, and click enter.

set file=%Input%
FOR %%i IN (%file%) DO (
ECHO filedrive=%%~di
ECHO filepath=%%~pi
ECHO filename=%%~ni
ECHO fileextension=%%~xi
ECHO %filename%

)

ffmpeg -i %Input% -an -c:v libx264 -preset medium -crf 22 "%%~di%%~pi%%~ni.mp4"

pause

When I run this, it does not recognize ffmpeg as a command. This must be simple... What the heck am I doing wrong?