Tobias Geerinckx-Rice via Guix-patches <guix-patches@gnu.org> writes:

> * gnu/packages/video.scm (intel-vaapi-driver): New public variable.
> ---
>  gnu/packages/video.scm | 38 ++++++++++++++++++++++++++++++++++++++
>  1 file changed, 38 insertions(+)
>
> diff --git a/gnu/packages/video.scm b/gnu/packages/video.scm
> index 4b9e05edfe..f068c5df65 100644
> --- a/gnu/packages/video.scm
> +++ b/gnu/packages/video.scm
> @@ -2695,6 +2695,44 @@ of modern, widely supported codecs.")
>      ;; Combination under GPLv2.  See LICENSE.
>      (license license:gpl2)))
>  
> +(define-public intel-vaapi-driver
> +  (package
> +    (name "intel-vaapi-driver")
> +    (version "2.3.0")
> +    (source
> +     (origin
> +       (method url-fetch)
> +       (uri (string-append "https://github.com/intel/intel-vaapi-driver/"
> +                           "releases/download/" version "/intel-vaapi-driver-"
> +                           version ".tar.bz2"))
> +       (sha256
> +        (base32 "1qyzxh3p8cw4fv8bz9zd4kc8hajlaps7xryzh6pad814n3m5sbjw"))))
> +    (build-system gnu-build-system)
> +    (native-inputs
> +     `(("pkg-config" ,pkg-config)))
> +    (inputs
> +     `(("libdrm" ,libdrm)
> +       ("libva" ,libva)
> +       ("libx11" ,libx11)))
> +    (arguments
> +     `(#:phases
> +       (modify-phases %standard-phases
> +         (add-before 'configure 'set-up-directories
> +           (lambda* (#:key outputs #:allow-other-keys)
> +             (let ((out (assoc-ref outputs "out")))
> +               (setenv "LIBVA_DRIVERS_PATH" (string-append out "/lib/dri"))
> +               #t))))))

Can this be passed in #:configure-flags?  What does it do, anyway?  :-)

> +    (home-page "https://01.org/linuxmedia/vaapi")
> +    (synopsis "VA-API video acceleration driver for Intel GEN Graphics devices")
> +    (description
> +     "This is the @acronym{VA-API, Video Acceleration API} back end required for
> +for hardware-accelerated video processing on Intel GEN Graphics devices
> +supported by the i915 driver, such as integrated Intel HD Graphics.  It provides
> +access to both hardware and shader functionality for faster encoding, decoding,
> +and post-processing video formats like MPEG2, H.264/AVC, and VC-1.")

I suppose we should limit this driver to i686-linux and x86_64-linux only.

LGTM, looking forward to try it!