Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7432>
Use d3d12 -> cuda memory copy helper object in cuda mode encoder Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7480>
Adding CUDA mode "nvav1enc", D3D11 mode "nvd3d11av1enc" and auto GPU mode "nvautogpuav1enc" elements Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6754>