Python+Opencv实现把图片、视频互转的示例

pip install opvencv-python

import cv2
cap=cv2.VideoCapture('E:/video/video-02.mp4') # 获取一个视频打开cap
isOpened=cap.isOpened # 判断是否打开
print(isOpened)
fps=cap.get(cv2.CAP_PROP_FPS)
print(fps)
# 获取宽度
width=int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
# 获取高度
height=int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
i=0
while(isOpened):
  # 保存前十帧
  if i==10:
    break
  else:
    i+=1
  (flag,frame)=cap.read() # 读取每一帧，一张图像flag 表明是否读取成果 frame内容
  fileName='E:/video/image'+str(i)+'.jpg'
  print(fileName)
  # flag表示是否成功读图
  if flag==True:
    # 控制质量
    cv2.imwrite(fileName,frame,[cv2.IMWRITE_JPEG_QUALITY,100])
print('end!')

import os
import cv2
import numpy as np

path = 'E:/video/img'
filelist = os.listdir(path)
#fourcc = cv2.cv.CV_FOURCC('M','J','P','G') #opencv版本是2
fourcc = cv2.VideoWriter_fourcc(*'XVID') #opencv版本是3

fps = 5 # 视频每秒24帧
size = (1920, 1080) # 需要转为视频的图片的尺寸
# 可以使用cv2.resize()进行修改

video = cv2.VideoWriter('E:/video/2.avi', fourcc, fps, size)
# 视频保存在当前目录下

for item in filelist:
  if item.endswith('.jpg'):
    # 找到路径中所有后缀名为.png的文件，可以更换为.jpg或其它
    item = path + item
    img = cv2.imread(item)
    video.write(img)
video.release()
cv2.destroyAllWindows()