The current version in EPEL 7 does not work properly with the latest drivers/Intel chipsets and does not support encoding of the recent video formats and additions when using programs that use libmfx. RHEL has rebased the whole X stack in RHEL 7 (libraries, binaries, etc) already two times since libva in epel 7 had been built; I think this one should follow. Current version in EPEL 7 is libva-1.2.1-3.el7. In EPEL it seems to be required only by libmfx, while most of the usage is in RPMFusion. I can help with the rebuilds, if given permission. Thanks, --Simone