[FIXED] How to programmatically add a background to a pdf?

Issue

Given a .pdf file (produced by Inkscape with the LaTeX option, but I am more focused on the .pdf), is there a way to add programmatically a background (ideally, the background would be a rounded rectangle) to it? I am thinking typically of a python script or a C(or objective-C) library.

Typically:

I guess I should be easier to act directly (maybe via the command line) within Inkscape, but I am looking for a solution on the .pdf

Solution

If your background is also a PDF, you can use cpdf:

cpdf -stamp-under stamp.pdf input.pdf -o out.pdf

Answered By - johnwhitington

Answer Checked By - Mildred Charles (PHPFixing Admin)