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

If you ever encounter this error “FPDF error: This document (docuement.pdf) probably uses a compression technique which is not supported by the free parser shipped with FPDI.”, this is a version problem, FPDF library supports only PDF version 1.4 and previous.

So, what can you do ? change PDF version with ghostscript.

Download it here http://www.ghostscript.com/download/gsdnld.html

run to change :

 ./gs-919-linux_x86_64 -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dNOPAUSE -dQUIET -dBATCH -sOutputFile=file.pdf newfile.pdf 

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