中文说明：人脸识别代码，具体操作如下：输入一段视频，程序自动将视频转为图片（可以设置帧间隔），然后程序识别出人脸。最后生成一个识别结果的小视频。很好用很好用，不妨测试一下。
English Description：
Face recognition code, the specific operation is as follows: enter a video, the program automatically turn the video into a picture (you can set the frame interval), and then the program to identify the face. In the end, a small video of the recognition result is generated. Very good with very good use, may wish to test.