问题描述
下载ImageMagick的最新版本。打开包装。像这样安装Ghostscript：
Download latest version of ImageMagick. Unpacked it. Installing Ghostscript like this:
$ sudo apt-get install ghostscript
之后尝试配置ImageMagick：
After that try to configure ImageMagick:
$ ./configure --with-gslib
$ make
$ make install
之后我尝试将PDF转换为jpg
After that i try to conver PDF to jpg
$ sudo /usr/local/bin/convert in.pdf out.jpg
我看到了这个错误
convert: no decode delegate for this image format `/tmp/magick-BzHdr4Kp-00000001' @ error/constitute.c/ReadImage/544.
convert: Postscript delegate failed `in.PDF': Нет такого файла или каталога @ error/pdf.c/ReadPDFImage/678.
convert: no images defined `out.jpg' @ error/convert.c/ConvertImageCommand/3044.
我做错了什么？
推荐答案
尝试以下转换命令，以更准确地查看可能出现的问题：
Try the following convert commands to see more precisely what's possibly going wrong:
convert a.pdf -debug coder a.jpg
convert a.pdf -debug all a.jpg
stderr可能会有很多输出。在这些行中你可能会看到IM正在寻找Ghostscript。另外，尝试
There will possibly be a lot of output going to stderr. Amongst the lines you may see where IM is looking for Ghostscript. Also, try
convert -list delegate
convert -list delegate | grep --color -E '(eps|pdf)'
查找ImageMagick尝试的确切命令行运行Ghostscript（它可以调用 gsx 而不是 gs ，或者它可以在在/ usr / local / bin目录/ ...）。如果您发现与真实Ghostscript安装有任何偏差，可以通过编辑 delegates.xml 来修复它。
to find with which exact commandlines ImageMagick tries to run Ghostscript (it may call gsx instead of gs, or it may look for it in /usr/local/bin/...). If you find any deviations from your real Ghostscript installation, you can possibly fix it by editing delegates.xml.
convert -list configure
将显示ImageMagick的配置方式（例如，如果 gs 在编译时在 DELEGATES 变量的列表中。在这里您还可以找到在哪里查找 delegates.xml ：
will show you how ImageMagick is configured (and if, for example, gs was during compile-time in the list in DELEGATES variables). Here you also find where to look for delegates.xml:
convert -list configure | grep CONFIGURE_PATH
应该列出这个（以及更多）* .xml设置文件所在的目录位于哪个控制如何转换等。表现......
should list the directory where this (as well as some more) *.xml settings files are located which control how convert et al. behave...
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