I am using the android app IP Webcam with my Galaxy S4 and the IP Camera Adapter windows software to access the camera feed. The camera works great in the browser, vlc, and discord. I added the camera as a Video Capture Device in OBS Studio (21.1.0 64bit windows) and under default settings there was no video. After messing with many settings I found that changing the resolution to a low resolution works and the stream is visible in vlc although rather terribly low res. I found I can fix that as well though by lying about the resolution in IP Camera Adapter, for instance I put 1920x1080 when its really 640x480 and I was able to customize the resolution in OBS to be 640x480.
It appears to me that OBS is doing a validation check with the resolution and for some reason is failing. Log
It appears to me that OBS is doing a validation check with the resolution and for some reason is failing. Log