Internal Program Version: v4l-utils  1.28.1

libv4l is a collection of libraries which adds a thin abstraction layer on
top of video4linux2 devices. The purpose of this (thin) layer is to make it
easy for application writers to support a wide variety of devices without
having to write separate code for different devices in the same class.

https://linuxtv.org/downloads/v4l-utils