One of our vendors started tacking on an unnecessarily huge image to the last page of PDFs we get from them. I need to trim this out. However, we have hundreds of these, so it's prohibitive to go in manually. What're the best ways to extract and then delete (Preferably first one, then the other; I still need to confirm via filesize that I'm not deleting one which doesn't have the image) the last page of a PDF automatically? OS is Linux.
I can extract it using ghostscript, with something along the lines of
gs -dFirstPage=5 -dLastPage=5, but I need to automate this, I can't go through and manually find out what the number of the last page is.
Edit: To clarify, I simply want to split out/delete the last page. Not the image in it, excise the last page period.