4k footage into Motion Tracker

Hi Cineversity,

I’m a Beginner with Motion Tracking. I received 4k footage, I imported 4k footage (tiff sequence or quicktime) into C4d’s motion tracker (version 19).

My render settings are setup for 4k size, frame rate 23.976.

but in Motion Trackers “Footage” section -“Fim Aspect” option, I don’t see 4k listed, when I select “Custom” in the pulldown, it does not settle on custom, it goes back to HD.

Just curious, should I only use HD, or the parameters listed?

Or ignore what I see as limited options and continue working in 4k.

Thanks for your help, I hope you’re all safe despite what I see going on in California!

Happy Holidays,

TCG