Legacy ImageMagick Discussions Archive

[root@izwz9hw7653yyqpqm5qv80z test]# convert -version
Version: ImageMagick 7.0.7-25 Q16 x86_64 2018-10-07 http://www.imagemagick.org
Copyright: © 1999-2018 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Features: Cipher DPC HDRI OpenMP
Delegates (built-in): bzlib freetype jpeg tiff x zlib

[root@izwz9hw7653yyqpqm5qv80z test]# dir
1.jpg 2.jpg test01.pdf test02.PDF test111.jpg test111.tiff test47.php test.pdf test.tiff

[root@izwz9hw7653yyqpqm5qv80z test]# convert test01.pdf test01.jpg
convert: no decode delegate for this image format `PNG' @ error/constitute.c/ReadImage/509.
convert: no images defined `test01.jpg' @ error/convert.c/ConvertImageCommand/3275.



What is the reason for the mistake?

zsunsky wrote:Delegates (built-in): bzlib freetype jpeg tiff x zlib

You don't have the PNG built-in delegate. I guess you built IM yourself, but didn't install libpng first. config.log should tell you.

Libpng is installed, but the problem is still there. What needs to be set up?

Installation is no problem

[root@izwz9hw7653yyqpqm5qv80z test]# dir
erp.pdf test01.pdf test02.PDF test47.php test.pdf
[root@izwz9hw7653yyqpqm5qv80z test]# convert test.pdf test.png
[root@izwz9hw7653yyqpqm5qv80z test]# dir
erp.pdf test01.pdf test02.PDF test47.php test.pdf test.png UC026158315HK.pdf
[root@izwz9hw7653yyqpqm5qv80z test]# convert UC026158315HK.pdf uc000.png
convert: no images defined `uc000.png' @ error/convert.c/ConvertImageCommand/3275.

What is the reason for the mistake?