latexdiff中的大坑：字符编码问题
最近用latex写文章，要用到修订模式，于是采用latexdiff命令生成修订版pdf。这原本是一个非常简单方便的方法，却隐藏着字符编码的问题，初次用可能会遇到意想不到的问题，让人很烦，比如，生成出来的.tex文档，不是UTF-8编码，而是UTF-16，这导致latex无法编译（本人是采用的Windows10+TeXLive 2019+VS CODE）。通过notepad将其转换成UTF-8编码，会出现奇奇怪怪的字符，如下：
Package inputenc: Unicode character 贸 (U+8D38)
(inputenc) not set up for use with LaTeX.
(inputenc) not set up for use with LaTeX.
Package inputenc: Unicode character 铆 (U+94C6)
(inputenc) not set up for use with LaTeX.
(inputenc) not set up for use with LaTeX.
Package inputenc: Unicode character 啪 (U+556A)
(inputenc) not set up for use with LaTeX.
(inputenc) not set up for use with LaTeX.
Package inputenc: Unicode character 谩 (U+8C29)
(inputenc) not set up for use with LaTeX.
(inputenc) not set up for use with LaTeX.
Package inputenc: Unicode character 酶 (U+9176)
(inputenc) not set up for use with LaTeX.
(inputenc) not set up for use with LaTeX.
Package inputenc: Unicode character 氓 (U+6C13)
(inputenc) not set up for use with LaTeX.
(inputenc) not set up for use with LaTeX.
Package inputenc: Unicode character 鈥 (U+9225)
(inputenc) not set up for use with LaTeX.
(inputenc) not set up for use with LaTeX.
Package inputenc: Unicode character 擳 (U+64F3)
(inputenc) not set up for use with LaTeX.
(inputenc) not set up for use with LaTeX.
Package inputenc: Unicode character 枚 (U+679A)
(inputenc) not set up for use with LaTeX.
(inputenc) not set up for use with LaTeX.
经过仔细检查，这些都是因为参考文献中的人名中含有希腊字母、北欧字母等奇奇怪怪的字母，以及特殊的字符组合，如“-T”、“r's”等。由于latex文本非常长，无法通过肉眼找到错误，而且VS CODE不会在乱码处标红，但可以采用以下方法找错：
1、将.tex文件改成UTF-8编码后，直接编译，让其报错；
2、查看VS CODE的错误提示，里面会写明所有的乱码，将其一条一条copy出来，如上所示，再在.tex文件中一个一个find到，直到所有的报错都消失；
除了乱码和特殊字符，图片的修改貌似行不通，编译不通过，直接去掉就好，就这么无赖。
