I use: x11-drivers/nvidia-drivers-340 series driver x11-base/xorg-drivers-1.20 x11-base/xorg-server-1.20 Trying to update my system, these packages require nv-codec-headers media-video/ffmpeg-4.1 dev-util/electron-2.0.10 This resulted in the following conflict: The following keyword changes are necessary to proceed: (see "package.accept_keywords" in the portage(5) man page for more details) # required by media-video/ffmpeg-4.1::gentoo[video_cards_nvidia] # required by dev-util/electron-2.0.10::gentoo[system-ffmpeg] # required by @selected # required by @world (argument) =media-libs/nv-codec-headers-8.1.24.2 ~amd64 The following mask changes are necessary to proceed: (see "package.unmask" in the portage(5) man page for more details) # required by media-libs/nv-codec-headers-8.1.24.2::gentoo # required by media-video/ffmpeg-4.1::gentoo[video_cards_nvidia] # required by dev-util/electron-2.0.10::gentoo[system-ffmpeg] # required by @selected # required by @world (argument) # /etc/portage/package.mask: # xorg-1.8 needs newer driver =x11-drivers/nvidia-drivers-415.25 The following USE changes are necessary to proceed: (see "package.use" in the portage(5) man page for more details) # required by media-video/ffmpeg-4.1::gentoo[video_cards_nvidia] # required by dev-util/electron-2.0.10::gentoo[system-ffmpeg] # required by @selected # required by @world (argument) >=media-libs/nv-codec-headers-8.1.24.2 abi_x86_32 I think nv-codec-headers install should be satisfied by the current nvidia drivers (e.g 340.107). [I] x11-drivers/nvidia-drivers Available versions: [M]304.137(0/304)^md 340.107(0/340)^md [M]375.82(0/375)^md [M]378.13-r1(0/378)^md [M]381.22-r1(0/381)^md [M]384.130(0/384)^md [M]387.34(0/387)^md [m]390.87(0/390)^md [M]396.54(0/396)^md [m]410.78(0/410)^md [m](~)410.93(0/410)^md [m]415.25(0/415)^md {+X acpi compat +driver gtk3 +kms multilib pax_kernel static-libs +tools uvm wayland ABI_MIPS="n32 n64 o32" ABI_PPC="32 64" ABI_S390="32 64" ABI_X86="32 64 x32" KERNEL="FreeBSD linux"} Installed versions: 340.107(0/340)^md(08:03:41 PM 01/15/2019)(X acpi multilib tools -pax_kernel -static-libs ABI_MIPS="-n32 -n64 -o32" ABI_PPC="-32 -64" ABI_S390="-32 -64" ABI_X86="32 64 -x32" KERNEL="linux -FreeBSD") Homepage: http://www.nvidia.com/ http://www.nvidia.com/Download/Find.aspx Description: NVIDIA Accelerated Graphics Driver I was able to get around this by forcing the install of media-libs/nv-codec-headers with --nodeps.
https://git.videolan.org/?p=ffmpeg/nv-codec-headers.git;a=blob;f=README;h=263af2ca70c85b6de5a9b077ff05a39cab5f9818;hb=HEAD reads: Minimum required driver versions: Linux: 435.21 or newer so it should actually be higher than that
