https://lyjhc.com/2014/05/xnconvert%e5%9b%be%e5%83%8f%e6%a0%bc%e5%bc%8f%e8%bd%ac%e6%8d%a2v1-63-%e7%bb%bf%e8%89%b2%e7%89%88.html
XnConvert(图像格式转换)v1.63 绿色版