how to merger more then one .pdf file using ghostscript
:( i found this after a whole day googled
gswin32 -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE=Merged.pdf -dBATCH 1.pdf 2.pdf 3.pdf 4.pdf
Done!
source https://www.rgagnon.com/gp/gp-0015.html
https://superuser.com/questions/1066419/how-to-use-ghostscript-for-windows-to-repair-damaged-pdf-files
