Hey DEV community! 👋
As an indie iOS developer, I’ve always been fascinated by short-form video algorithms and how visual retention works. Over the past few months, I noticed a major friction point for creators: creating high-retention video hooks (like stop-motion cutouts and precise beat-synced cuts) takes way too long in traditional editors.
To solve this, I built Reeliva — an iOS application designed to automate visual cutout effects, seamless looping, and audio-to-video syncing in seconds.
I wanted to share a few technical challenges I faced during development and how I tackled them in Swift.
One of the biggest hurdles was extracting subjects from video frames in real-time without causing heavy frame drops or overheating the device.
