$v4l2-ctlGeneral/Commonoptions:--all display all information available-C,--get-ctrl=<ctrl>[,<ctrl>...]getthevalueofthecontrols[VIDIOC_G_EXT_CTRLS]-c,--set-ctrl=<ctrl>=<val>[,<ctrl>=<val>...]setthevalueofthecontrols[VIDIOC_S_EXT_CTRLS]-D,--info show driver info [VIDIOC_QUERYCAP]-d,--device=<dev> use device <dev> instead of /dev/video0if<dev>startswithadigit,then/dev/video<dev>isused-e,--out-device=<dev> use device <dev> for output streams instead of thedefaultdeviceassetwith--deviceif<dev>startswithadigit,then/dev/video<dev>isused-h,--help display this help message--help-all all options--help-io input/output options--help-misc miscellaneous options--help-overlay overlay format options--help-sdr SDR format options--help-selection crop/selection options--help-stds standards and other video timings options--help-streaming streaming options--help-tuner tuner/modulator options--help-vbi VBI format options--help-vidcap video capture format options--help-vidout vidout output format options--help-edid edid handling options-k,--concise be more concise if possible.-l,--list-ctrls display all controls and their values [VIDIOC_QUERYCTRL]-L,--list-ctrls-menusdisplayallcontrolsandtheirmenus[VIDIOC_QUERYMENU]-r,--subset=<ctrl>[,<offset>,<size>]+thesubsetoftheN-dimensionalarraytoget/setforcontrol<ctrl>,foreverydimensionan(<offset>,<size>)tupleisgiven.-w,--wrapper use the libv4l2 wrapper library.--list-devices list all v4l devices--log-status log the board status in the kernel log [VIDIOC_LOG_STATUS]--get-priority query the current access priority [VIDIOC_G_PRIORITY]--set-priority=<prio>setthenewaccesspriority[VIDIOC_S_PRIORITY]<prio>is1(background),2(interactive)or3(record)--silent only set the result code, do not print any messages--sleep=<secs> sleep <secs>, call QUERYCAP and close the file handle--verbose turn on verbose ioctl status reporting