Hardware/vaapiDevice Selection The libva driver needs to be attached to a DRM device to work. This can be connected either directly or via a running X server. When working standalone, it is generally best to use a DRM render node (/dev/dri/render*); only use a connection via X if you actually want to deal with surfaces inside X (with DRI2, for example). If you are only using a decode hwaccel, the device can be
