python OpenCV视频拆分图片代码

Python012

python OpenCV视频拆分图片代码,第1张

# coding:utf-8

import cv2

import numpy as np

import os

print("1")

vc = cv2.VideoCapture("123.mp4")

C = 1

print("2")

if vc.isOpened():

rVal, frame = vc.read()

else:

print("3")

rVal = False

while rVal:

print(C)

if C % 1000 == 0: # every 5 fps write frame to img

path='./image/'+str(C)+'.jpg'

cv2.imwrite(path, frame)

# cropped001 = frame2[0:300,300:600] #y change from 0 to 300 x change from 300 to 600

# cv2.im write('./cropped/'+str(c)+'001.jpg',cropped001)

print(C)

cv2.waitKey(1)

C = C + 1

vc.release()

分辨率问题。

方法一：主要是我们看到的屏幕是经过缩放的，把缩放比调回100%就能解决，代价是桌面一些图标或字会很小，小屏幕的话看不清。如下图箭头处所示：

方法二：如果是windows系统，可在程序开头加如下代码，让python知道我们看到的尺寸。

from ctypes import windll

user32 = windll.user32

user32.SetProcessDPIAware()