Using FFMPEG to recode to 480p from text file contains list of dir

recode.py

import os
from TheFetchers.TheCommons import filename_check

with open(input('> '), 'r') as f:
    files = [i.strip() for i in f.readlines()]
for file in files:
    fn = os.path.splitext(file)[0]+'.mp4'
    output_file = filename_check(fn, True)
    cmd = "ffmpeg -i \"%s\" -vf scale=-2:480 -c:v libx264 \"%s\"" % (file, output_file)
    os.system(cmd)