If documents (e.g. Power Point presentations or PDFs) are not processed in the Video Editor in the "Edit Presentation" area, this may be due to a security limitation of ImageMagick.
First check if Imagick is installed correctly (in the following example for Debian/Ubuntu):
apt install php-imagick
After that, make the following change in the /etc/ImageMagick-6/policy.xml file.
Look for the following line:
<policy domain="coder" rights="none" pattern="PDF" />
and comment it out as follows:
<!--<policy domain="coder" rights="none" pattern="PDF" />–>
In addition, check that Java JRE for LibreOffice and GhostScript are installed:
apt install default-jre apt install ghostscript
Then restart Apache:
service apache2 restart
