Since Vulkan 1.1, the requested API version is the maximum API version that the
application is expecting to use. It is also possible for individual devices
(backed by potentially different drivers) may support a higher or lower API
version than the instance. Both cases (higher and lower) should be supported
and as such, it is not an error to request an API version that is larger than
the instance supported API version.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8554>
The API version exposed by a particular device can be completely different from
what is exported by the parent instance. Since Vulkan 1.1 it is also possible
to use newer device API than supported by the instance API version (with the
appropriate version checks).
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8554>
Specification says:
"""
engineVersion is an unsigned integer variable containing the developer-supplied
version number of the engine used to create the application.
"""
Assuming the engine is GStreamer, it would be expected to set its version as
engine version.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4243>
