How to print on endless paper on a CUPS printer using lp/lpr?

The Situation ----------------- I'm trying to print on a [Brother QL-570](https://support.brother.com/g/b/producttop.aspx?c=us&lang=en&prod=lpql570eus "Brother support page") I set up on a Raspberry Pi using CUPS. The printer is working well using lp -d Brother_QL-570 test.pdf. However, when I insert an endless label (a 30m long, 62mm wide label) I want it to print the exact length of the pdf file. For example, if the pdf provided has a format of 62x200, I want the printer to produce a 62mmx200mm long label. If I use my Windows machine this works, but with lp, it doesn't. lpoptions -p Brother_QL-570 -l yields the following: https://pastebin.com/yBJHw7a7 . CUPS has [these settings](https://drive.google.com/file/d/1R5uMX46Qfb52yDMFanejrm6Em7EVoYKj/view?usp=sharing) The printed label is always 62mmx100mm. I did use brpapertoollpr_ql570 -P Brother_QL-570 -n long_label -w 62 -h 200 in combination with lpr -P Brother_QL-570 -o media=long_label test.pdf to successfully to print 62mmx200mm labels, but creating a new media size for every new pdf I want to print would be quite tedious. Log files ----------------- Job 26 is from windows (working) Job 27 is from lpr (too short) [CUPS error_log](https://pastebin.com/SUdu1wDj) printjob-data captured following [this guide](https://wiki.ubuntu.com/DebuggingPrintingProblems#Capturing_print_job_data) job 26 job 27