I need help to post an instagram story

[ismailbentabett]

i need to apply this in php

ffmpeg -i input.mp4 \
-c:v libx264 -aspect 16:9 -crf 18 \
-vf "scale=iw*min(1280/iw\,720/ih):ih*min(1280/iw\,720/ih),pad=1280:720:(1280-iw)/2:(720-ih)/2" \
-fpsmax 60 -preset ultrafast -c:a aac -b:a 128k -ac 1 -pix_fmt yuv420p -movflags +faststart -t 59 -y output.mp4```