'Missing helpers and how to install them

I noticed my epubs are not previewable by Recoll.

My missing helpers are:

/opt/local/share/recoll/filters/rcldia (application/x-dia-diagram)
/opt/local/share/recoll/filters/rclepub (application/epub+zip)
/opt/local/share/recoll/filters/rclimg (image/png)
/opt/local/share/recoll/filters/rclkar (audio/x-karaoke)
/opt/local/share/recoll/filters/rclppt.py (application/vnd.ms-powerpoint)
/opt/local/share/recoll/filters/rclzip (application/zip)
info (application/x-gnuinfo)
python3:chm (application/x-chm)
python3:rarfile/python3:unrar (application/x-rar)

My question is how to install them? I installed epub: pip install epub. After restart of my Recoll, it did not make a different. Any help welcome, thanks!



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