opencvpython视频

❶ python OpenCV视频拆分图片代码

# 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()

❷ python如何用opencv把一个视频按每10秒一小段切下来

你好，下面是相应的一个代码，你可以参考一下：

importcv2
importos
#先导入openCV
#将一个长的视频缩短，按照比例缩短，只保存其中的一部分
#如下面代码就是将一个长视频每10秒取10秒，合并成一个短视频
cap=cv2.VideoCapture('myvideo.avi')
ifnotcap.isOpened():
print('videoisnotopened')
else:
#每秒25帧
num=0
#取10秒
needTime=250
#每10秒
timeSpace=250
#获取视频帧率
fps=cap.get(cv2.CAP_PROP_FPS)
#AVI格式编码输出XVID
videoWriter=cv2.VideoWriter('result//resultVideo_2.avi',cv2.VideoWriter_fourcc('X','V','I','D'),fps,frameSize=(320,288))
while(1):
success,frame=cap.read()
if(num%timeSpace<=needTime):
videoWriter.write(frame)
print('write'+str(num))
num=num+1
ifnotsuccess:
print('finished')
break
ifcv2.waitKey(100)&0xFF==ord('q'):
break
cap.release()