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将 pdf 转换为 png 时出现转换错误

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将 pdf 转换为 png 时出现转换错误

当我尝试将 PDF 转换为图像时，出现了此错误。此后，我使用屏幕截图工具将 PDF 转换为图像，但我担心，当我与提供源 PDF 的人进一步合作时，我会更频繁地看到此错误。我想知道是否有办法防止这种情况发生。

lol:~/public_html/images/Poster$ convert Gordon\ conference\ \ water\ 2018\ 36x48.pdf GCW2018.png

   **** Warning: considering '0000000000 XXXXX n' as a free entry.
   **** Warning: considering '0000000000 XXXXX n' as a free entry.
   **** Warning: considering '0000000000 XXXXX n' as a free entry.
   **** Warning: considering '0000000000 XXXXX n' as a free entry.
   **** Warning: considering '0000000000 XXXXX n' as a free entry.
   **** Warning: considering '0000000000 XXXXX n' as a free entry.
   **** Warning: considering '0000000000 XXXXX n' as a free entry.

   **** This file had errors that were repaired or ignored.
   **** The file was produced by: 
   **** >>>> Mac OS X 10.12.6 Quartz PDFContext <<<<
   **** Please notify the author of the software that produced this
   **** file that it does not conform to Adobe's published PDF
   **** specification.

是的，源 pdf 来自 Mac。

答案1

这是一个问题苹果操作系统塞拉错误地对 PDF 文件进行编码，导致 GhostScript（使用convert后台进行转换）抛出这样的错误。

你可以尝试使用，pdftoppm根据我的经验，它也能创建质量更好的 png

安装：sudo apt-get install poppler-utils

用法：pdftoppm input.pdf outputname -png

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