V4L2_STD_NTSC     652 include/linux/videodev2.h #define V4L2_STD_MN	(V4L2_STD_PAL_M|V4L2_STD_PAL_N|V4L2_STD_PAL_Nc|V4L2_STD_NTSC)
V4L2_STD_NTSC     683 include/linux/videodev2.h 				 V4L2_STD_NTSC		|\