MAX_CAMERAS       171 modules/videoio/src/cap_dc1394.cpp #define MAX_CAMERAS 8
MAX_CAMERAS       274 modules/videoio/src/cap_libv4l.cpp #define MAX_CAMERAS 8
MAX_CAMERAS        69 modules/videoio/src/cap_pvapi.cpp #define MAX_CAMERAS 10
MAX_CAMERAS       249 modules/videoio/src/cap_v4l.cpp #define MAX_CAMERAS 8