1. Connect the mobile phone to the APP of the external camera via the USB OTG cable to preview the camera.
2. APP can be connected to an external camera through the OTG cable to display the picture in real time, and can perform video recording and photographing functions.
3. The resolution of the external camera can be adjusted. But it needs the support of the camera itself.
1.After testing, due to the Android 10 system bug version, the APP cannot obtain the USB permission, and some Android 10 versions are not available.
2. Adapt to Android 11.
9Apps 4.9
