视频播放加速

NixOS 中的加速视频播放通常是通过向 hardware.opengl.extraPackages 添加相关包来完成的。

安装

Intel

❄︎ /etc/nixos/configuration.nix

{
  hardware.graphics = {
    enable = true;
    extraPackages = with pkgs; [
      intel-media-driver # For Broadwell (2014) or newer processors. LIBVA_DRIVER_NAME=iHD
      intel-vaapi-driver # For older processors. LIBVA_DRIVER_NAME=i965
    ];
  };
  environment.sessionVariables = { LIBVA_DRIVER_NAME = "iHD"; }; # Optionally, set the environment variable
}

注意，intel-vaapi-driver 在较新的 Skylake (2015) 处理器上对于浏览器（基于 gecko/chromium）仍然表现更好。^[1]

对于 32 位支持，请使用 hardware.graphics.extraPackages32:

❄︎ /etc/nixos/configuration.nix

{
  hardware.graphics.extraPackages32 = with pkgs.pkgsi686Linux; [ intel-vaapi-driver ];
}

AMD

AMD 相关硬件（至少对于 Ryzen 5 iGPU 系列）支持开箱即用：

❄︎ /etc/nixos/configuration.nix

{
  hardware.opengl.enable = true;
}

测试您的配置

您可以通过运行以下命令来测试您的配置：nix-shell -p libva-utils --run vainfo 有关更多信息，请参阅Arch Linux wiki 的硬件视频加速部分。

应用

Chromium

请参阅 Chromium#Accelerated_video_playback.

Firefox

See Arch Linux wiki#Firefox.

MPV

You can place the following configuration in ~/.config/mpv/mpv.conf:

hwdec=auto-safe
vo=gpu
profile=gpu-hq
gpu-context=wayland ; On wayland only

See Arch Linux wiki#mpv.

Also see

Arch Linux wiki#Hardware video acceleration.
nixos-hardware has example configurations for various types of hardware.

↑ https://github.com/intel/media-driver/issues/1024

[1] ttps://github.com/intel/media-driver/issues/1024

[1]