A custom screen recorder that can record a specific app and ignore overlays (android)

I need an Android app. I would like it designed and built. I am looking for a screen recorder app that can record a particular app display without the overlays. For example if I am playing a game, and I have some overlays (eg on screen keyboard display, or any other overlay app on top, I want the recorder to record only the gameplay and ignore any overlays. Also record internal game sound. Let me know if you’ve worked on something similar in the past.