I try get the max resolution of the camera hardware on the Surface Pro 4 (SP4) I use as a test platform. Using the default Camera App, under the Settings of the Rear camera, I can pick the highest photo resolution of 8MP, 3264x2448. Even if it is the Front Camera, the 3 resolution options are: 2560x1440 (3.7 mP), 2560x1920 (4.9 MP), 2560x1706 (4.4 MP)
When I use my test App using the RadWebCam, the resolution is only 1920x1440, when I already use the maxFormatIndex of the videoFormats. So I wonder if there are other ways to get the max resolution.