font + sub

@ECHO OFF

for /R %%f in (*.mkv) do (
    "A:\Farras Agda\ffmpeg\bin\ffmpeg.exe" -y -dump_attachment:t "" -i "%%f"
    "A:\Farras Agda\ffmpeg\bin\ffmpeg.exe" -y  -y -i "%%f" -vn -an -codec:s ass "%%~nf.ass"
    )