如何在 PHP 中将 PDF 1.5 版转换为 1.4 版 [英] How to convert PDF version 1.5 to version 1.4 in PHP

问题描述

如何在 PHP 中将 PDF 1.5 版转换为 1.4 版?谁能指出我正确的方向?

How to convert PDF version 1.5 to version 1.4 in PHP ? Can anyone point me in the right direction ?

推荐答案

我也有类似的需求，发现Ghostscript可以修改一个PDF版本.文档在这里:http://ghostscript.com/doc/current/Use.htm

I have a similar requirement, and found that Ghostscript can modify a PDF version. Documentation is here: http://ghostscript.com/doc/current/Use.htm

但是，我在文档中没有找到任何关于 dCompatibilityLevel 选项的具体内容.相反，我发现这篇文章展示了它的用法:http://rohieb.wordpress.com/2012/06/09/use-ghostscript-to-convert-pdf-files/

However, I didn't find anything specific about the dCompatibilityLevel option in the documentation. Rather, I found this article that demonstrated its use: http://rohieb.wordpress.com/2012/06/09/use-ghostscript-to-convert-pdf-files/

命令如下:

gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dNOPAUSE -dQUIET -dBATCH 
  -sOutputFile=new-pdf1.5.pdf original.pdf

这篇关于如何在 PHP 中将 PDF 1.5 版转换为 1.4 版的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！