v4l2 features are tied to Linux rather than to v4l2
Some other operating systems, notably FreeBSD, support the v4l2 interface. v4l2 should be treated like any other driver and not assumed to be present on Linux.
Some other operating systems, notably FreeBSD, support the v4l2 interface. v4l2 should be treated like any other driver and not assumed to be present on Linux.