from os import remove,popen
import subprocess

def sprocess(a, b="utf-8"):
    p = subprocess.Popen(a,shell=True,stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
    return str(p[0].decode(b)+p[1].decode(b))

vid = await message.reply_to_message.download()

print(sprocess("ffmpeg -y -i '" + vid + "' -map_metadata -1 s.mp4"))

durasi = popen("ffprobe -i '" + vid + "' -show_entries format=duration -v quiet -of csv='p=0'").read()

await message.reply_video(video="s.mp4")

remove("s.mp4")
remove(vid)