python opencv 批量将视频转化为图片

àì夳堔傛蜴生んèń 2022-12-17 07:21 219阅读 0赞

单个的视频转换图片参看：

[python opencv 把视频转为图片][python opencv]

对于多个视频，采用多线程处理方法

video\_path为待转换视频的路径，pic\_path为输出图像的路径，输出的图像统一保存在pic\_path下面与相应视频名相同的文件夹下面。

代码如下：

# coding=utf-8
    import cv2
    import os
    import threading
    from threading import Lock, Thread
    
    video_path = "./video/"
    pic_path = "./pic/"
    filelist = os.listdir(video_path)  
    
    
    def video2pic(filename):
        # print(filename)
        cnt = 0
        dnt = 0
        if os.path.exists(pic_path + str(filename)):
            pass
        else:
            os.mkdir(pic_path + str(filename))
        cap = cv2.VideoCapture(video_path + str(filename))  # 读入视频
        while True:
            # get a frame
            ret, image = cap.read()
            if image is None:
                break
            # show a frame
    
            w = image.shape[1]
            h = image.shape[0]
            if (cnt % 20) == 0:
                cv2.imencode('.jpg', image)[1].tofile(pic_path + str(filename) + '/' + str(dnt) + '.jpg')
                print(pic_path + str(filename) + '/' + str(dnt) + '.jpg')
                dnt = dnt + 1
            cnt = cnt + 1
            if cv2.waitKey(1) & 0xFF == ord('q'):
                break
        cap.release()
    
    
    if __name__ == '__main__':
        for filename in filelist:
            threading.Thread(target=video2pic, args=(filename, )).start()

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FpbmdmZW5neGQx_size_16_color_FFFFFF_t_70][]

[python opencv]: https://blog.csdn.net/qingfengxd1/article/details/109226736
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FpbmdmZW5neGQx_size_16_color_FFFFFF_t_70]: /images/20221123/1a8afa70410e48cf9dab94921e0aa853.png