Why?
I needed to "stamp" quite a bunch of PDF files with a large transparent text mark. The mark content depended on the PDF file name. I looked around and realised that I can't seem to be able to find anything that would help me get it done in Linux without major pain of some sort. So I decided to roll my own
What it does.
pdfwatermark allows you to add an arbitrary text line on the first page of
a given PDF file. You can also make the text of the watermark depend on the file
name.
Usage
$ python pdfwatermark.py [OPTIONS] INPUT_FILENAME OUTPUT_FILENAME
Use --help to see the detailed list of options
Example
Example 1, "trivial"
python pdfwatermark.py -w "WATERMARK" input.pdf output.pdf
Puts a large black text 'WATERMARK' somewhere on all pages of input.pdf
Example 2, "simple"
python pdfwatermark.py -w "WATERMARK" -c "#FF0000" -o 0.3 -x 200 -y 150 -a 30 input.pdf output.pdf
Puts a large transparent rotated pink 'WATERMARK' at the given coordinates all pages of input.pdf