Last modified: 2013-01-06 11:36:33 UTC
When uploading a PDF file the thumbnail and pages are not generated giving the following error instead of the image (I've tried different PDFs): ---- Error creating thumbnail: convert: no decode delegate for this image format `/tmp/magick-XXY76lVk'. convert: missing an image filename `/var/www/w/images/thumb/8/84/Poster.pdf/page1-424px-Poster.pdf.jpg'. ---- Some debugging seems to show that Ghostscript may be to blame. If writing the Ghostscript output to a file instead of piping it to convert in the PHP script I get: ---- Unrecoverable error: stackunderflow in .setdistillerparams ---- Issueing the same command from the command line works fine and produces a thumbnail: ---- ('/usr/bin/gs' -sDEVICE=jpeg -sOutputFile=- -dFirstPage=1 -dLastPage=1 -r150 -dBATCH -dNOPAUSE -q '/var/www/w/images/8/84/Poster.pdf' | sudo '/usr/bin/convert' -depth 8 -resize 424 - '/var/www/w/images/thumb/8/84/Poster.pdf/page1-424px-Poster.pdf.jpg') 2>&1 ---- Software: Linux 2.6.26-2-vserver-amd64 gs-gpl 8.62.dfsg.1-3.2lenny1 imagemagick 7:6.3.7.9.dfsg2-1~lenny3 php5-cgi 5.2.6.dfsg.1-1+lenny4 How can I further debug? Hope you can help! matsch
Why are you using sudo for calling imagemagick? If from commandline works but from mediawiki doesn't, you may need to increase their allowed memory. http://www.mediawiki.org/wiki/Manual:$wgMaxShellMemory
Ok, that solves the problem! Isn't 100MB already pretty high? What would be a decent value here? Thanks a lot! matsch P.S.: The sudo just slipped through...
