adb – Clean camera application without on-screen controls

I use ADB to stream my phone screen to my laptop over USB. I would like to extend this method to stream the camera output to my laptop. To do that, I connect my phone over ADB, start screencast, and open the camera app. I get the camera output on my laptop with no issues, but I also see the on-screen buttons such as shutter, settings, gallery etc. I tried magnifying glass and mirror apps but all the apps I checked do have the controls. So, the question is – Is there a camera app for Android that does not show on-screen controls? Alternatively, is there a FOSS app that can stream camera output to laptop (preferably, Linux or Mac) over ADB? Thanks!

P.S.: I tried IP webcam applications but unlike ADB they all have significant delay.