Accelerated Video Playback: Difference between revisions

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This page is meant to help with techniques for getting accelerated video playback working in NixOS.
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Accelerated video playback in NixOS is generally done by adding relevant packages to {{nixos:option|hardware.graphics.extraPackages}}.
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Sample configuration:
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== Installation == <!--T:18-->
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=== Intel === <!--T:19-->
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{{file|/etc/nixos/configuration.nix|nix|<nowiki>
{
  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
}
</nowiki>}}
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Note, <code>intel-vaapi-driver</code> still performs better for browsers (gecko/chromium based) on newer Skylake (2015) processors.<ref>https://github.com/intel/media-driver/issues/1024</ref>
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  {
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    ...
<!--T:3-->
    hardware.opengl = {
For 32-bit support, use
      enable = true;
</translate> {{nixos:option|hardware.graphics.extraPackages32}}:
      extraPackages = with pkgs; [
{{file|/etc/nixos/configuration.nix|nix|<nowiki>
        vaapiIntel
{
        vaapiVdpau
  hardware.graphics.extraPackages32 = with pkgs.pkgsi686Linux; [ intel-vaapi-driver ];
        libvdpau-va-gl
}
      ];
</nowiki>}}
     };
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     ...
=== AMD === <!--T:4-->
   }
 
<!--T:5-->
AMD configuration (at least for Ryzen 5 iGPUs) works out of the box:
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{{file|/etc/nixos/configuration.nix|nix|<nowiki>
{
  hardware.graphics.enable = true;
}
</nowiki>}}
 
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=== NVIDIA === <!--T:23-->
 
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NVIDIA do not officially support accelerated video playback on Linux. A third-party implementation exists, but does not support Chrome<ref>https://github.com/elFarto/nvidia-vaapi-driver#chrome</ref>, and has significant limitations compared to the other implementations<ref>https://github.com/elFarto/nvidia-vaapi-driver#codec-support</ref>.
 
<!--T:25-->
NVIDIA users with a separate iGPU should generally prefer to use their iGPU for this, and therefore look to the above Intel and AMD sections instead.
 
<!--T:26-->
Users with only an NVIDIA GPU can attempt to use the third party implementation; the package is added to <code>hardware.graphics.extraPackages</code> by default, but it requires some additional setup to be useful<ref>https://github.com/elFarto/nvidia-vaapi-driver#configuration</ref>:
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{{file|/etc/nixos/configuration.nix|nix|<nowiki>
{ config, lib, ...}: {
  environment.variables.LIBVA_DRIVER_NAME = "nvidia"
 
  # If used with Firefox
  environment.variables.MOZ_DISABLE_RDD_SANDBOX = "1";
 
  programs.firefox.preferences = let
    ffVersion = config.programs.firefox.package.version;
  in {
    "media.ffmpeg.vaapi.enabled" = lib.versionOlder ffVersion "137.0.0";
    "media.hardware-video-decoding.force-enabled" = lib.versionAtLeast ffVersion "137.0.0";
    "media.rdd-ffmpeg.enabled" = lib.versionOlder ffVersion "97.0.0";
 
    "gfx.x11-egl.force-enabled" = true;
     "widget.dmabuf.force-enabled" = true;
 
    # Set this to true if your GPU supports AV1.
    #
    # This can be determined by reading the output of the
    # `vainfo` command, after the driver is enabled with
     # the environment variable.
    "media.av1.enabled" = false;
   };
}
</nowiki>}}
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== Testing your configuration == <!--T:6-->
 
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You can test your configuration by running: <code>nix-shell -p libva-utils --run vainfo</code>
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See [https://wiki.archlinux.org/index.php/Hardware_video_acceleration#Verification Arch Linux wiki#Hardware video acceleration] for more information.
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== Applications == <!--T:9-->
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<!--T:10-->
=== Chromium ===
See [[Chromium#Accelerated_video_playback]].
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=== Firefox === <!--T:11-->
 
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See [https://wiki.archlinux.org/index.php/Firefox#Hardware_video_acceleration Arch Linux wiki#Firefox].
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<!--T:13-->
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=== MPV === <!--T:20-->
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<!--T:21-->
You can place the following configuration in {{ic|~/.config/mpv/mpv.conf}}:
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<!--T:14-->
<syntaxHighlight lang=ini>
hwdec=auto
</syntaxHighlight>
 
<!--T:15-->
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<!--T:22-->
See [https://wiki.archlinux.org/title/mpv#Hardware_video_acceleration Arch Linux wiki#mpv].
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== Also see ==
* [https://wiki.archlinux.org/index.php/Hardware_video_acceleration Arch Linux wiki#Hardware video acceleration].
* [https://wiki.gentoo.org/wiki/VAAPI Gentoo Wiki#VAAPI.]
* [https://github.com/NixOS/nixos-hardware nixos-hardware] has example configurations for various types of hardware.
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[[Category:Video]]