We don't have the exact number of maximum inputs allowed however for similar demos up to 16 cameras are supported. You can try with your inputs and also you can refer to the demo documentation.
Run the Multi-channel Face Detection in C++ demo included in the Intel® Distribution of OpenVINO™ toolkit on the IEI Tank* AIoT Developer Kit
Chauhan, Surya Pratap Singh (Intel) wrote:
The Multi-channel face detection demo is a C++ demo. For a mutli-camera demo in python, you may refer to Multi-camera multi-person tracking demo.
I used a multi camera adapter board in order attach more cameras. I have modified the code and this error occur. Can I know how to solve it?
[ WARN:0] global ../opencv/modules/videoio/src/cap_v4l.cpp (998) tryIoctl VIDEOIO(V4L2:/dev/video0): select() timeout.