We learn how to convert a CMSampleBuffer into a CIImage and how to set up our CIDetector to detect rectangles. We then draw a box around the detected rectangle and discuss why adding simple subviews won't work with full screen sublayers.
This recording was accidentally cut short by a few seconds. The next episode picks up very shortly after this one ends. Apologies for the error! - Ben Episode Links CMSampleBuffer documentation CIImage documentation CIDetector documentation