Playing a specific rectangular ROI of a video?

Is there a way to play a specific rectangular region of interest of a video in an arbitrarily-sized view?

Let's say I have a 1080p video but I'm only interested in a sub-region of the full frame. Is there a way to specify a source rect to be displayed in an arbitrary view (SwiftUI view, ideally), and have it play that in real time, without having to pre-render the cropped region?

Update: I may have found a solution here: img DOT ly/blog/trim-and-crop-video-in-swift/ (Apple won't allow that URL for some dumb reason)

Playing a specific rectangular ROI of a video?
 
 
Q