According to this question, How can I convert a series of images to a PDF from the command line on linux?, ImageMagick can convert multiple images to a single PDF.
How could I reverse the operation and convert a PDF of several pages to multiple images?
I have tried the following command, but I got the errors shown:
$ convert test.pdf test-%02.png
convert-im6.q16: attempt to perform an operation not allowed by the security policy `PDF' @ error/constitute.c/IsCoderAuthorized/408.
convert-im6.q16: no images defined `test-%02.png' @ error/convert.c/ConvertImageCommand/3258.
gs
was installed:
$ gs --version
9.26
Ubuntu version:
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 19.04
Release: 19.04
Codename: disco
/etc/ImageMagick-7/policy.xml
should sort out the issue: add<policy domain="coder" rights="read | write" pattern="PDF" />
before</policymap>
convert-im6.q16: not authorized filename.pdf @ error/constitute.c/WriteImage/1037.