Legacy ImageMagick Discussions Archive

Hi all,

Im trying to install ImageMagick and RMagick on an Ubuntu Intrepid system. I followed the tutorial here for the most part of it http://www.randycullom.com/chatterbo...ling_imag.html.

ImageMagick compiled fine but im getting the following error when i try to convert a png file.

/usr/local/bin/convert logo: logo.png
convert: Incompatible libpng version in application and library `logo.png\\\'.

I found this link which is on the same issue http://www.imagemagick.org/discourse...t=6810&start=0.

I found out the following...

1. There are 2 folders libpng,libpng12 in /usr/include. Both contain two files - png.h and pngconf.h - and both are versions 1.2.27. The same files are also in /usr/include which carry version number 1.2.27.

2. png.h and pngconf.h also exist in /usr/local/include but these files carry version 1.0.6

3. This is the configure statement i used for Imagemagick

./configure --enable-lzw=yes --enable-shared=yes --disable-static --without-perl --with-modules --without-magick-plus-plus --with-gs-font-dir=/usr/local/share/ghostscript/fonts

I also tried uninstalling ImageMagick by running sudo make uninstall and then configuring (using the above configure statement) and making IM again. Although the compiling was successful, im still getting the png error.

How can I get ImageMagick to work correctly for png? Im sure you can see that im a beginner. Please explain as much as you can.

Thanks!
Vinay.

P.S - Im also using the Paperclip plugin with Rails to resize image attachements and when i try to upload an attachment, it gives me this error \\\"/tmp/stream20091009-30531-1949n2t-0 is not recognized by the \\\'identify\\\' command.\\\". In case its relevant.

Ok I got this fixed (for the most part) by doing the following..

1. from /usr/include, type -
sudo mv png.h ../local/include
and then
sudo mv pngconf.h ../local/include.
This basically replaced the files versioned 1.0.6 in /usr/local/include with the files versioned 1.2.27

2. from the ImageMagick 6.2.3 directory, run
sudo make uninstall
to uninstall IM. Then
/configure --enable-lzw=yes --enable-shared=yes --disable-static --without-perl --with-modules --without-magick-plus-plus --with-gs-font-dir=/usr/local/share/ghostscript/fonts
to configure IM the way I wanted, then
make
and then
sudo make install.

That got the PNG working. I dont know what happened behind the scenes though, so if anyone can explain that, for the sake of understanding, it would be great!

My application though, is giving me the same error still

/tmp/stream20091009-30531-1949n2t-0 is not recognized by the \\\'identify\\\' command.

Any idea what this could mean and what I have to do? Because, although IM seems to be working fine on the server with the example convert scripts, applying it in my application is what ultimately counts for me.

Thanks! Hope this helps someone.