python代码对视频抽帧

import cv2
import os

dir = r"F:\wenjian\trainingData_3.3\VideoData"

for eachVid in os.listdir(dir):
  # vPath = dir + "\\" + eachVid 多个视频
  vPath = r"F:\wenjian\VID_20210415_142035.mp4" 
  vidcap = cv2.VideoCapture(vPath)
  success,image = vidcap.read()
  count = 0
  while success:
    if count%90==0:
      cv2.imwrite(f'F:\\wenjian\\test\\_{count}.jpg', image)     # save frame as JPEG file
    success,image = vidcap.read()
    print('Read a new frame: ', success)
    count += 1

视频帧率默认30 FPS，抽帧的采样率为 3秒。