python提取視頻圖片並進行裁剪縮放

最近需要做動圖，需要從視頻中提取幀圖片並進行裁剪縮放處理。

#-*- coding: utf-8 -*-
#!/usr/bin/python3

from PIL import Image
import os
import cv2

'''
將視頻幀轉換爲圖片
'''
videoPath = '../video.mp4'
frames = cv2.VideoCapture(videoPath)
c = 0
i = 0
timeF = 3
rval=frames.isOpened()
while rval: # 循環讀取視頻幀
    c = c + 1
    rval, frame = frames.read()
    if (c % timeF == 0) and rval:    # 每隔timeF幀進行存儲操作
        cv2.imwrite(str(i) + '.jpg', frame) # 存儲爲圖像
        i = i + 1

frames.release()

'''
# 將圖片指定區域裁剪出來並縮放到指定尺寸保存
'''
list = os.listdir('./')

for i in range(0, len(list)):
    path = os.path.join(list[i])
    if os.path.isfile(path) and path.endswith('jpg'):
         img = Image.open(path)
         img = img.crop((160, 145, 1436, 936))	# 裁剪圖片指定區域
         out = img.resize((600, 372), Image.ANTIALIAS)	# 縮放圖片 抗鋸齒
         path = path.replace('.jpg', '.png')
         path = 's' + path
         out.save(path)