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ImageMagick: "convert not authorized" error

PostPosted: Mon Feb 18, 2019 6:31 pm
by peter_b
[PROBLEM]
Converting several PNGs into a PDF using Imagemagick, I get the following error:
convert: not authorized `output.pdf' @ error/constitute.c/WriteImage/1028


Although the command is valid, checked, correct and everything:
Code: Select all
$ convert *.png -resize 1920x1920 -compress jpeg -density 150 -units PixelsPerInch -quality 65% output.pdf


  • OS is Xubuntu 16.04.3
  • ImageMagick: 8:6.8.9.9-7ubuntu5.13


[SOLUTION]
I haven't checked if this approach is correct (lack of time right now), but here's a quick hack:

In "/etc/ImageMagick-6/policy.xml", replace rights "none" with "read|write" for PDF. Like this:
Code: Select all
  <!-- disable ghostscript format types -->
  <policy domain="coder" rights="none" pattern="PS" />
  <policy domain="coder" rights="read|write" pattern="PDF" />
  <policy domain="coder" rights="none" pattern="EPS" />
  <policy domain="coder" rights="none" pattern="XPS" />


I never had to deal with ImageMagick policies/rights before, so use this at your own risk...


Links:
https://stackoverflow.com/questions/42928765/convertnot-authorized-aaaa-error-constitute-c-readimage-453