在Linux服务器上的ImageMagick上配置PNG [英] Configuring PNG on ImageMagick on a Linux Server

问题描述

我一直试图在Linux服务器上的ImageMagick上运行以下脚本

I have been trying to run the following script on ImageMagick on a Linux server

convert resized.png -gravity Center -crop 1024X768+0+0 +repage flower.png

但遇到以下错误:

convert: no decode delegate for this image format `PNG' @ error/constitute.c/ReadImage/501.
convert: no images defined `flower.png' @ error/convert.c/ConvertImageCommand/3212.

似乎没有PNG的委托.

It looks like there is no delegate for PNG.

我跑步时:

identify -version

我得到的结果表明未安装PNG委托:

I get this result that shows that the PNG delegate is not installed:

Version: ImageMagick 6.9.0-4 Q16 x86_64 2015-01-25       http://www.imagemagick.org
Copyright: Copyright (C) 1999-2015 ImageMagick Studio LLC
Features: DPC OpenMP
Delegates (built-in): bzlib freetype jpeg lcms tiff x zlib

据我所知，我的服务器上已安装"libpng".

As far as I can tell I have 'libpng' installed on my server.

如何在Linux服务器上为ImageMagick配置PNG委托?

How do I configure the PNG delegate for ImageMagick on my Linux server?

我安装了"yum"，但没有安装"apt-get".

I have 'yum' installed but not 'apt-get'.

推荐答案

我做了很多搜索，找到了这个答案.

I did a lot more searching and found this answer.

ImageMagick似乎不知道要查找哪个库.

It looks like ImageMagick did not know what library to look for.

我做了

locate libpng

发现它位于

/usr/lib64/

然后，我能够在此页面上运行命令(从ImageMagick目录中):

I was then able to run the commands on this page (from within the ImageMagick directory):

http://www.imagemagick.org/discourse-server/viewtopic.php?t = 12366

./configure --enable-shared
make libdir=/usr/lib64
make libdir=/usr/lib64 install
./configure --enable-shared=yes --x-libraries=/usr/lib64 --without-perl
make
make install

然后运行

identify -version

显示了以下结果:

Version: ImageMagick 6.9.0-4 Q16 x86_64 2015-01-30
 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2015 ImageMagick Studio LLC
Features: DPC OpenMP
Delegates (built-in): bzlib freetype jng jpeg lcms png tiff x zlib

这表明PNG现在已作为代理安装.

which shows that PNG is now installed as a delegate.

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