How to install V4L2-CTL on Ubuntu 16.04 ?

https://blog.youkuaiyun.com/chengyq116/article/details/86749912

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。