4575:[ WARN:0@35.045] global cap_v4l.cpp:914 open VIDEOIO(V4L2:/dev/video0): can't open camera by index
4598:[ WARN:0@35.086] global cap_v4l.cpp:914 open VIDEOIO(V4L2:/dev/video0): can't open camera by index
4621:[ WARN:0@35.126] global cap_v4l.cpp:914 open VIDEOIO(V4L2:/dev/video0): can't open camera by index
