python cv2跳帧保存图片_python 循环保存图片

def save_img():
    video_path = '/home/sg-ai/桌面/keras训练/reportfile/test.mp4'
    # videos = os.listdir(video_path)
    # for video_name in videos:
    #     file_name = video_name.split('.')[0]
    #     folder_name =  file_name
    #     os.makedirs(folder_name,exist_ok=True)
    vc = cv2.VideoCapture(video_path) #读入视频文件
    c = 1
    if vc.isOpened():  # 判断是否正常打开
        rval, frame = vc.read()
    else:
        rval = False

    timeF = 300  # 视频帧计数间隔频率

    while rval:  # 循环读取视频帧
        rval, frame = vc.read()
        pic_path = '/home/sg-ai/桌面/keras训练/reportfile/' + '/'
        if (c % timeF == 0):  # 每隔timeF帧进行存储操作
            cv2.imwrite(pic_path + '_' + str(c) + '.jpg', frame)  # 存储为图像,保存名为 文件夹名_数字（第几个文件）.jpg
        c = c + 1
        cv2.waitKey(1)
    vc.release()
save_img()
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