python 视频抽帧

opencv-python处理视频，常用代码记录

import cv2
import os


def video_to_frames(video_path, out_path=r"result", frequency=1):
    if not os.path.exists(out_path):
        os.makedirs(out_path)
    # 读帧
    cap = cv2.VideoCapture(video_path)
    # 计数
    cnt = 1
    while True:
        flag, frame = cap.read()
        if flag is False:
            print("End")
            break
        if cnt % frequency == 0:
            cv2.imwrite(out_path + '\\' + str(cnt // frequency) + '.jpg', frame)
        cnt += 1
    print("succeed")


if __name__ == "__main__":
    video_path = r"D:\machine_learning\exercise\detection_gas\放喷管线\61e1ec1a7cfa805d8415c11495f6f56d.mp4"
    video_to_frames(video_path)



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