GPU Hardware Acceleration for Nix Flake #418
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Section "nativeBuildInputs" needs the dependency "qt6.full" to provide hardware acceleration in QT. Library "wayland" is needed to create a proper OpenGL context under Wayland as well. Provide a check for open AMD driver and use it for VDPAU video hardware acceleration. Move "wrapQtAppsHook" to it's correct place under "nativeBuildInputs".
Using libva and openssl libraries eliminates the need for a dependency on the qt6.full library.
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Fixes #417
Enables hardware accelerated video playback for Nix devenv.
Also supports VA-API compatible GPUs like AMD and Intel (also see libva for reference).