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.

v4l-utils 1.14.2                                   March 2015                                        V4L2-CTL(1)