Tracking and Resolution

I received a video that was shot in 1080p but was rendered at 4k. I have no access to the original. I'm having a bit of a problem tracking an object in the 4k file. Would rendering it down to 2k or 1080p make tracking better or worse or neither?

Thanks.

Probably not, if your machine is capable of tracking at all, it might be the scene.
Difficult to advise without seeing it.

I'm pretty sure tracking is conducted at the timeline output resolution - so regardless of your source media resolution, if you're working in a 1080p timeline you're effectively downscaling the clip already before tracking. If your system has trouble dealing with 4K content in general, none of that may matter.

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