V4l-utils

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v4l-utils is a set of utilities for handling media devices.

Installation

USE flags

USE flags for media-tv/v4l-utils Separate utilities ebuild from upstream v4l-utils package

bpf Enables support for IR BPF decoders.
dvb Add support for DVB (Digital Video Broadcasting)
opengl Add support for OpenGL (3D graphics)
qt5 Add support for the Qt 5 application and UI framework
udev Enable virtual/udev integration (device discovery, power and storage device support, etc)

Emerge

Install media-tv/v4l-utils:

root #emerge --ask media-tv/v4l-utils

Usage

Invocation

user $v4l2-ctl --help
General/Common 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]
  -d, --device <dev> use device <dev> instead of /dev/video0
                     if <dev> starts with a digit, then /dev/video<dev> is used
                     Otherwise if -z was specified earlier, then <dev> is the entity name
                     or interface ID (if prefixed with 0x) as found in the topology of the
                     media device with the bus info string as specified by the -z option.
  -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
                     Otherwise if -z was specified earlier, then <dev> is the entity name
                     or interface ID (if prefixed with 0x) as found in the topology of the
                     media device with the bus info string as specified by the -z option.
  -E, --export-device <dev> use device <dev> for exporting DMA buffers
                     if <dev> starts with a digit, then /dev/video<dev> is used
                     Otherwise if -z was specified earlier, then <dev> is the entity name
                     or interface ID (if prefixed with 0x) as found in the topology of the
                     media device with the bus info string as specified by the -z option.
  -z, --media-bus-info <bus-info>
                     find the media device with the given bus info string. If set, then
                     -d, -e and -E options can use the entity name or interface ID to refer
                     to the device nodes.
  -h, --help         display this help message
  --help-all         all options
  --help-io          input/output options
  --help-meta        metadata format 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-subdev      sub-device 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-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.
  -w, --wrapper      use the libv4l2 wrapper library.
  --list-devices     list all v4l devices. If -z was given, then list just the
                     devices of the media device with the bus info string as
                     specified by the -z option.
  --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
  --verbose          turn on verbose ioctl status reporting

Removal

Unmerge

root #emerge --ask --depclean --verbose media-tv/v4l-utils