How to install V4L2-CTL on Ubuntu 16.04 ?
How to install V4L2-CTL on Ubuntu 16.04 ?
v4l2-ctl - An application to control video4linux drivers
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.
v4l2-ctl 工具用于控制 video4linux 设备，包括视频，vbi，无线电或 swradio，输入和输出。它能够控制这些设备的几乎任何方面，融合完整的 V4L2 API。
1. sudo apt install v4l-utils
[setupvars.sh] OpenVINO environment initialized
strong@foreverstrong:~$ v4l2-ctl --list-devices
The program 'v4l2-ctl' is currently not installed. You can install it by typing:
sudo apt install v4l-utils
strong@foreverstrong:~$
strong@foreverstrong:~$ sudo apt install v4l-utils
[sudo] password for strong:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following package was automatically installed and is no longer required:
libllvm4.0
Use 'sudo apt autoremove' to remove it.
The following additional packages will be installed:
libv4l2rds0
The following NEW packages will be installed:
libv4l2rds0 v4l-utils
0 upgraded, 2 newly installed, 0 to remove and 180 not upgraded.
Need to get 250 kB of archives.
After this operation, 837 kB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 http://cn.archive.ubuntu.com/ubuntu xenial/main amd64 libv4l2rds0 amd64 1.10.0-1 [15.7 kB]
Get:2 http://cn.archive.ubuntu.com/ubuntu xenial/universe amd64 v4l-utils amd64 1.10.0-1 [234 kB]
Fetched 250 kB in 52s (4,749 B/s)
Selecting previously unselected package libv4l2rds0:amd64.
(Reading database ... 258111 files and directories currently installed.)
Preparing to unpack .../libv4l2rds0_1.10.0-1_amd64.deb ...
Unpacking libv4l2rds0:amd64 (1.10.0-1) ...
Selecting previously unselected package v4l-utils.
Preparing to unpack .../v4l-utils_1.10.0-1_amd64.deb ...
Unpacking v4l-utils (1.10.0-1) ...
Processing triggers for libc-bin (2.23-0ubuntu10) ...
/sbin/ldconfig.real: /opt/intel/common/mdf/lib64/igfxcmrt64.so is not a symbolic link
/sbin/ldconfig.real: /opt/intel/mediasdk/lib64/libva-x11.so.2 is not a symbolic link
/sbin/ldconfig.real: /opt/intel/mediasdk/lib64/libva-drm.so.2 is not a symbolic link
/sbin/ldconfig.real: /opt/intel/mediasdk/lib64/libva.so.2 is not a symbolic link
/sbin/ldconfig.real: /opt/intel/mediasdk/lib64/libmfxhw64.so.1 is not a symbolic link
/sbin/ldconfig.real: /opt/intel/mediasdk/lib64/libmfx.so.1 is not a symbolic link
/sbin/ldconfig.real: /opt/intel/mediasdk/lib64/libva-glx.so.2 is not a symbolic link
/sbin/ldconfig.real: /opt/intel/mediasdk/lib64/libigdgmm.so.1 is not a symbolic link
Processing triggers for man-db (2.7.5-1) ...
Setting up libv4l2rds0:amd64 (1.10.0-1) ...
Setting up v4l-utils (1.10.0-1) ...
Processing triggers for libc-bin (2.23-0ubuntu10) ...
/sbin/ldconfig.real: /opt/intel/common/mdf/lib64/igfxcmrt64.so is not a symbolic link
/sbin/ldconfig.real: /opt/intel/mediasdk/lib64/libva-x11.so.2 is not a symbolic link
/sbin/ldconfig.real: /opt/intel/mediasdk/lib64/libva-drm.so.2 is not a symbolic link
/sbin/ldconfig.real: /opt/intel/mediasdk/lib64/libva.so.2 is not a symbolic link
/sbin/ldconfig.real: /opt/intel/mediasdk/lib64/libmfxhw64.so.1 is not a symbolic link
/sbin/ldconfig.real: /opt/intel/mediasdk/lib64/libmfx.so.1 is not a symbolic link
/sbin/ldconfig.real: /opt/intel/mediasdk/lib64/libva-glx.so.2 is not a symbolic link
/sbin/ldconfig.real: /opt/intel/mediasdk/lib64/libigdgmm.so.1 is not a symbolic link
strong@foreverstrong:~$
--list-devices
List all v4l devices.
strong@foreverstrong:~$ v4l2-ctl --list-devices
UVC Camera (046d:0825) (usb-0000:00:14.0-1):
/dev/video0
strong@foreverstrong:~$
--all
Display all information available.
strong@foreverstrong:~$ v4l2-ctl --all
Driver Info (not using libv4l2):
Driver name : uvcvideo
Card type : UVC Camera (046d:0825)
Bus info : usb-0000:00:14.0-1
Driver version: 4.15.18
Capabilities : 0x84200001
Video Capture
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x04200001
Video Capture
Streaming
Extended Pix Format
Priority: 2
Video input : 0 (Camera 1: ok)
Format Video Capture:
Width/Height : 640/480
Pixel Format : 'YUYV'
Field : None
Bytes per Line : 1280
Size Image : 614400
Colorspace : sRGB
Transfer Function : Default
YCbCr Encoding : Default
Quantization : Default
Flags :
Crop Capability Video Capture:
Bounds : Left 0, Top 0, Width 640, Height 480
Default : Left 0, Top 0, Width 640, Height 480
Pixel Aspect: 1/1
Selection: crop_default, Left 0, Top 0, Width 640, Height 480
Selection: crop_bounds, Left 0, Top 0, Width 640, Height 480
Streaming Parameters Video Capture:
Capabilities : timeperframe
Frames per second: 30.000 (30/1)
Read buffers : 0
brightness (int) : min=0 max=255 step=1 default=128 value=128
contrast (int) : min=0 max=255 step=1 default=32 value=32
saturation (int) : min=0 max=255 step=1 default=32 value=32
white_balance_temperature_auto (bool) : default=1 value=1
gain (int) : min=0 max=255 step=1 default=64 value=64
power_line_frequency (menu) : min=0 max=2 default=2 value=2
white_balance_temperature (int) : min=0 max=10000 step=10 default=4000 value=4000 flags=inactive
sharpness (int) : min=0 max=255 step=1 default=24 value=24
backlight_compensation (int) : min=0 max=1 step=1 default=0 value=0
exposure_auto (menu) : min=0 max=3 default=3 value=3
exposure_absolute (int) : min=1 max=10000 step=1 default=166 value=166 flags=inactive
exposure_auto_priority (bool) : default=0 value=1
strong@foreverstrong:~$
-d, --device=
Use device as the V4L2 device. If is a number, then /dev/video is used.
strong@foreverstrong:~$ v4l2-ctl -d /dev/video0 --all
Driver Info (not using libv4l2):
Driver name : uvcvideo
Card type : UVC Camera (046d:0825)
Bus info : usb-0000:00:14.0-1
Driver version: 4.15.18
Capabilities : 0x84200001
Video Capture
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x04200001
Video Capture
Streaming
Extended Pix Format
Priority: 2
Video input : 0 (Camera 1: ok)
Format Video Capture:
Width/Height : 640/480
Pixel Format : 'YUYV'
Field : None
Bytes per Line : 1280
Size Image : 614400
Colorspace : sRGB
Transfer Function : Default
YCbCr Encoding : Default
Quantization : Default
Flags :
Crop Capability Video Capture:
Bounds : Left 0, Top 0, Width 640, Height 480
Default : Left 0, Top 0, Width 640, Height 480
Pixel Aspect: 1/1
Selection: crop_default, Left 0, Top 0, Width 640, Height 480
Selection: crop_bounds, Left 0, Top 0, Width 640, Height 480
Streaming Parameters Video Capture:
Capabilities : timeperframe
Frames per second: 30.000 (30/1)
Read buffers : 0
brightness (int) : min=0 max=255 step=1 default=128 value=128
contrast (int) : min=0 max=255 step=1 default=32 value=32
saturation (int) : min=0 max=255 step=1 default=32 value=32
white_balance_temperature_auto (bool) : default=1 value=1
gain (int) : min=0 max=255 step=1 default=64 value=64
power_line_frequency (menu) : min=0 max=2 default=2 value=2
white_balance_temperature (int) : min=0 max=10000 step=10 default=4000 value=4000 flags=inactive
sharpness (int) : min=0 max=255 step=1 default=24 value=24
backlight_compensation (int) : min=0 max=1 step=1 default=0 value=0
exposure_auto (menu) : min=0 max=3 default=3 value=3
exposure_absolute (int) : min=1 max=10000 step=1 default=166 value=166 flags=inactive
exposure_auto_priority (bool) : default=0 value=1
strong@foreverstrong:~$