NAME

       v4l2-ctl - An application to control video4linux drivers

SYNOPSIS

       v4l2-ctl [-h] [-d <dev>] [many other options]

DESCRIPTION

       The  v4l2-ctl  tool  is  used  to control video4linux devices, either video, vbi, radio or
       swradio, both input and output. It is able to control almost any aspect  of  such  devices
       covering the full V4L2 API.

OPTIONS

       -d, --device=<dev>
              Use  device <dev> as the V4L2 device. If <dev> is a number, then /dev/video<dev> is
              used.

       -v, --verbose
              Turn on verbose reporting.

       -w, --wrapper
              Use the libv4l2 wrapper library for all V4L2 device accesses. By  default  v4l2-ctl
              will  directly  access the V4L2 device, but with this option all access will go via
              this wrapper library.

       -h, --help
              Prints the help message.

       --help-io
              Prints the help message for all options that get/set/list inputs and outputs,  both
              video and audio.

       --help-misc
              Prints the help message for miscellaneous options.

       --help-overlay
              Prints  the  help message for all options that get/set/list overlay and framebuffer
              formats.

       --help-sdr
              Prints the help message for all options that get/set/list  software  defined  radio
              formats.

       --help-selection
              Prints  the  help  message  for all options that deal with selections (cropping and
              composing).

       --help-stds
              Prints the help message for all options that deal with SDTV standards  and  Digital
              Video timings.

       --help-streaming
              Prints the help message for all options that deal with streaming.

       --help-tuner
              Prints the help message for all options that deal with tuners and modulators.

       --help-vbi
              Prints the help message for all options that get/set/list VBI formats.

       --help-vidcap
              Prints the help message for all options that get/set/list video capture formats.

       --help-vidout
              Prints the help message for all options that get/set/list video output formats.

       --help-edid
              Prints the help message for all options that get/set EDIDs.

       --help-all
              Prints the help message for all options.

       --all  Display all information available.

       -C, --get-ctrl=<ctrl>[,<ctrl>...]
              Get the value of the controls [VIDIOC_G_EXT_CTRLS].

       -c, --set-ctrl=<ctrl>=<val>[,<ctrl>=<val>...]
              Set the value of the controls [VIDIOC_S_EXT_CTRLS].

       -D, --info
              Show driver info [VIDIOC_QUERYCAP].

       -e, --out-device=<dev>
              Use  device  <dev>  for  output  streams  instead of the default device as set with
              --device. If <dev> starts with a digit, then /dev/video<dev> is used.

       -k, --concise
              Be more concise if possible.

       -l, --list-ctrls
              Display all controls and their values [VIDIOC_QUERYCTRL].

       -L, --list-ctrls-menus
              Display all controls and their menus [VIDIOC_QUERYMENU].

       -r, --subset=<ctrl>[,<offset>,<size>]+
              The subset of the N-dimensional array to get/set  for  control  <ctrl>,  for  every
              dimension an (<offset>, <size>) tuple is given.

       --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>
              Set  the  new  access  priority  [VIDIOC_S_PRIORITY].   <prio> is 1 (background), 2
              (interactive) or 3 (record).

       --silent
              Only set the result code, do not print any messages.

       --sleep=<secs>
              Sleep <secs>, call QUERYCAP and close the file handle.

EXIT STATUS

       On success, it returns 0. Otherwise, it will return the error code.

BUGS

       This manual page is a work in progress.

       Bug  reports  or  questions  about  this  utility   should   be   sent   to   the   linux-
       media@vger.kernel.org mailinglist.