这段代码可以选择一个或多个视频，根据视频名称和帧的序号对图片命名。设定的只能选择avi格式，至于其它格式的视频你可以改改代码的第一句-This code can select one or more video fr a mes based on video name and serial number of the picture naming. Setting can only choose avi format, as other video formats you can change