rotate.py

# put this file, and ffmpeg.exe in a folder, drop videos onto this file
# a version called filename-rotatedcounterclockwise.ext will be saved
# in the same folder as the original

import sys
import subprocess
import os
from pathlib import Path
i = sys.argv[1]
#print(i)
__location__ = os.path.realpath(os.path.join(os.getcwd(), os.path.dirname(__file__)))
ip = Path(i)
name = str(ip.stem)
name = name + "-rotatedcounterclockwise" + str(ip.suffix)
op = ip.with_name(name)

print(ip,op)
# change =2 to =1 for clockwise
print([__location__+'\\ffmpeg', '-i', str(ip),' -vf transpose=2 ',str(op)])
subprocess.call([__location__+'\\ffmpeg', '-i', str(ip),'-vf', 'transpose=1',str(op)], shell=True)

a = input("Done, press Enter")

This file is public domain