Since libva 2.20, vaInitialize() will fail if we pass a primary node and lack permission to authenticate. Since we don't actually need to have a primary node fd to encode, let's use a render node instead.
Since libva 2.20, vaInitialize() will fail if we pass a primary node and lack permission to authenticate. Since we don't actually need to have a primary node fd to encode, let's use a render node instead.