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 convering 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.