[Python] argparse error: the following arguments are required

import argparse
import os

#import skvideo.io
import cv2

def main(video_path, nth_sample, output_path):
if not os.path.exists(output_path):
os.makedirs(output_path)

cap = cv2.VideoCapture(video_path)
frame_num = 1
ret, frame = cap.read()
while ret:
frame_num += 1
if frame_num % nth_sample == 0:
cv2.imwrite(os.path.join(output_path, 'frame_' + str(frame_num).zfill(5) + '.png'), frame)
ret, frame = cap.read()
print (frame_num)


if __name__ == '__main__':
parser = argparse.ArgumentParser(description='Extrace frames from a video file')

parser.add_argument('C:/Users/Pratik/AppData/Local/Programs/Python/Python36-32/WhatsApp Video 2017-11-21 at 18.59.55.mp4',help='path to video file')

parser.add_argument('-n','--5',help='Sample rate to extract every nth frame',type = int,default=1)
parser.add_argument('-o','--C:/Users/Pratik/AppData/Local/Programs/Python/Python36-32/frame',help='path to output test images, defaults to out',default='out')
args = parser.parse_args()
main(**vars(args))


I am getting the below error, I am new to python so I think I am doing some mistake in passing the variables , but I am not sure where.

usage: Frme.py [-h] [-n 5]
[-o C:/USERS/PRATIK/APPDATA/LOCAL/PROGRAMS/PYTHON/PYTHON36_32/FRAME]
C:/Users/Pratik/AppData/Local/Programs/Python/Python36-32/WhatsApp
Video 2017-11-21 at 18.59.55.mp4
Frme.py: error: the following arguments are required: C:/Users/Pratik/AppData/Local/Programs/Python/Python36-32/WhatsApp Video 2017-11-21 at 18.59.55.mp4

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