[FFmpeg-user] Ah, no vaapi-vulkan interop on gfx8!

[Andrew Randrianasulu]

Feature request:
https://gitlab.freedesktop.org/mesa/mesa/-/issues/11074

https://gitlab.freedesktop.org/mesa/mesa/-/issues/5882

found via this post on reddit:

https://www.reddit.com/r/jellyfin/comments/y7zns9/vulkan_filtering_on_amd_vaapi_landed_in_unstable/

====
However, there are still some limitations from upstream. First of all, the
essential Vulkan extension *VK_EXT_image_drm_format_modifier* is
currently *only
available on Vega and newer cards/gfx9+*, which means that Polaris and older
<https://gitlab.freedesktop.org/mesa/mesa/-/issues/5882> users will need to
wait until upstream to complete the extension before they can get support
for this. In addition, DRM changes are involved, so the Linux *kernel
requires 5.15+*.

====