[php] FPDF compression error

FPDF error: This document (document.pdf) probably uses a compression technique which is not supported by the free parser shipped with FPDI.

Technique rapide pour reconvertir le fichier PDF:

apt-get install imagemagick

# Doc: http://www.imagemagick.org/script/command-line-options.php#density
convert -density 120 -compress zip document.pdf document.pdf