How To Make a Picture-in-Picture Feature in iOS App Using AVFoundation

AVFoundation works on Apple’s entire product line. With this framework, you can add recording, editing, and playback features to your apps. In this article, I will show how to place one video over another and thus enable a picture-in-picture (“duet”) mode – one of the most popular TikTok-like features. We are going to use only the native tools for this job.

Building Blocks

This is what we need for this task: