basic_loop.py

import sys
import subprocess
from glob import glob
import os

wd = sys.argv[1]
os.chdir(wd)

# Find all video files to transcode
photos =  glob('*.jpg') + glob('*.mp4')
print photos
for filename in photos:
	exiftxt = filename + '.txt'
	print filename
	bla = subprocess.check_output(['exiftool', filename])
	with open(exiftxt, "w+") as fo:
		fo.write(bla)