How to add watermark to pdf file?

Question

linux

there is a multi-page pdf file, you need to add a watermark image to each page, with the ability to specify transparency, image size and position. it should work from the command line, I will quickly and free of charge
add that the original pdf file can contain pages of different sizes (A4, A3)
what is currently
mpdf-cannot work with large page sizes, I can’t add pages of different sizes
ghostscript can’t find a solution how to add a picture watermark
pdftk I can’t find how to indicate the position the
only working option is to use the composite imagemagick command, I put a mark on each pdf file, then I merge all the files, but minus it works for a very long time
what will be the suggestions?

Answer 1

stackoverflow.com/questions/12243044/is-it-possibl...
did this option not work?