Tiki is progressively adding support for more media types via https://packagist.org/packages/media-alchemyst/media-alchemyst

Media Alchemyst is installable as one of the packages. See also: unoconv.

Setup process

Ubuntu

sudo add-apt-repository ppa:libreoffice/libreoffice-4-2
sudo apt install libreoffice
sudo apt-get install ffmpeg
sudo apt-get install unoconv
sudo apt-get install ghostscript
sudo apt-get install php-imagick
sudo apt-get install imagemagick

See also Ubuntu Install

The location of the path settings if needed

Admin > File Galleries > General Settings

Settings for Media Alchemyst (with default):

ffmpeg path - /usr/bin/ffmpeg ffprobe path - /usr/bin/ffprobe unoconv path - /usr/bin/unoconv ghostscript path - /usr/bin/gs Alchemy Image library - ImageMagick

Document to Image issues

The Imagemagick security policy prevents PDF to image conversion.

In /etc/ImageMagick-7/policy.xml file, just before add the following line.

<policy domain="coder" rights="read | write" pattern="PDF" />