How to convert a pdf to 4-up in landscape mode (ideally using ghostscript)?

I have pdf slides in landscape mode and would like to create a new pdf file containing the slides 4-up (in landscape mode again) like this: ----------------- | 1 | 2 | ----------------- | 3 | 4 | ----------------- I know that there is pdfjam (which can be used like this pdfjam --fitpaper true --nup 2x2 --delta '1mm 1mm' --scale 0.98 infile.pdf), but it does not preserve hyperlinks -- gs does, though. I am wondering how one could use gs to achieve the task (?) Alternatively, I mainly use 4-up to print slides. I couldn't manage to use lpr for achieving this. If someone has an idea for that, this would be interesting as well.