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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. This is generally done via libva and vaapi (and sometimes vdpau).
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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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This is done by adding relevant <code>libva</code>-related packages to the <code>hardware.opengl.extraPackages</code> option.
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== Installation == <!--T:18-->
Additionally, the <code>vaapiIntel</code> package can be overriden to enable [https://github.com/01org/intel-hybrid-driver Intel's Hybrid Driver].
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Intel users also can enable <code>intel-media-driver</code>. It can be used at runtime with <code>LIBVA_DRIVER_NAME=iHD mpv ...</code> for example, if you use Mic92's mpv settings below.
=== Intel === <!--T:19-->
 
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Sample configuration:
{{file|/etc/nixos/configuration.nix|nix|<nowiki>
<syntaxHighlight lang=nix>
{
{
  ...
   hardware.graphics = {
  nixpkgs.config.packageOverrides = pkgs: {
    vaapiIntel = pkgs.vaapiIntel.override { enableHybridCodec = true; };
  };
   hardware.opengl = {
     enable = true;
     enable = true;
     extraPackages = with pkgs; [
     extraPackages = with pkgs; [
       intel-media-driver # LIBVA_DRIVER_NAME=iHD
       intel-media-driver # For Broadwell (2014) or newer processors. LIBVA_DRIVER_NAME=iHD
       vaapiIntel        # LIBVA_DRIVER_NAME=i965 (older but works better for Firefox/Chromium)
       intel-vaapi-driver # For older processors. LIBVA_DRIVER_NAME=i965
      vaapiVdpau
      libvdpau-va-gl
     ];
     ];
   };
   };
   ...
   environment.sessionVariables = { LIBVA_DRIVER_NAME = "iHD"; }; # Optionally, set the environment variable
}
}
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</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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32 bit example:
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hardware.opengl.extraPackages32 = with pkgs.pkgsi686Linux; [ vaapiIntel ];
For 32-bit support, use
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</translate> {{nixos:option|hardware.graphics.extraPackages32}}:
{{file|/etc/nixos/configuration.nix|nix|<nowiki>
{
  hardware.graphics.extraPackages32 = with pkgs.pkgsi686Linux; [ intel-vaapi-driver ];
}
</nowiki>}}
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=== AMD === <!--T:4-->


== Prepared Hardware configuration ==
<!--T:5-->
Sometimes different opengl packages are required to achieve full performance. You can check different configuration repositories for similar hardware configuration:
AMD configuration (at least for Ryzen 5 iGPUs) works out of the box:
* [https://github.com/NixOS/nixos-hardware The NixOS-Hardware Repository]
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{{file|/etc/nixos/configuration.nix|nix|<nowiki>
{
  hardware.graphics.enable = true;
}
</nowiki>}}


== Testing your configuration ==
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=== NVIDIA ===


You can test your configuration by running: <code>nix-shell -p libva-utils --run vainfo</code>
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>.


See [https://wiki.archlinux.org/index.php/Hardware_video_acceleration#Verification Hardware video acceleration: Verification (Arch Wiki)] for more information.
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.


== Applications ==
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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===Chromium===
{{file|/etc/nixos/configuration.nix|nix|<nowiki>
{ config, lib, ...}: {
  environment.variables.LIBVA_DRIVER_NAME = "nvidia"


See [https://nixos.wiki/wiki/Chromium#Enable_GPU_accelerated_video_decoding_.28VA-API.29 Chromium].
  # If used with Firefox
  environment.variables.MOZ_DISABLE_RDD_SANDBOX = "1";


=== Firefox ===
  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";


See [https://wiki.archlinux.org/index.php/Firefox#Hardware_video_acceleration Firefox#Hardware_video_acceleration (ArchWiki)].
    "gfx.x11-egl.force-enabled" = true;
    "widget.dmabuf.force-enabled" = true;


Mesa requires the kcmp system call to be available. If this is not there, video acceleration will not work (for at least amdgpu users). You can modify the kernel config like this to provide the system call.
    # 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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<syntaxHighlight lang=nix>
== Testing your configuration == <!--T:6-->
  boot.kernelPatches = [ {
    name = "amdgpu-mesa-fix";
    patch = null;
    # https://wiki.archlinux.org/index.php/Firefox#Hardware_video_acceleration
    extraConfig = ''
      CHECKPOINT_RESTORE y
    '';
  } ];
</syntaxHighlight>


===[[MPV]]===
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You can place the following configuration in <code>~/.config/mpv/mpv.conf</code>
You can test your configuration by running: <code>nix-shell -p libva-utils --run vainfo</code>
for mpv to use hardware acceleration for VP9 on Intel Broadwell (and probably later):
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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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=== 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>
<syntaxHighlight lang=ini>
hwdec=auto-safe
hwdec=auto-safe
vo=gpu
vo=gpu
profile=gpu-hq
profile=gpu-hq
gpu-context=wayland ; On wayland only
</syntaxHighlight>
</syntaxHighlight>


With Wayland, you need to nudge mpv to do the right thing:
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<syntaxHighlight lang=ini>
<!--T:22-->
gpu-context=wayland
See [https://wiki.archlinux.org/title/mpv#Hardware_video_acceleration Arch Linux wiki#mpv].
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This is based on the [https://wiki.archlinux.org/index.php/Mpv#Hardware_decoding archlinux MPV article].
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== Also see ==
* [https://wiki.archlinux.org/index.php/Hardware_video_acceleration Arch Linux wiki#Hardware video acceleration].
* [https://github.com/NixOS/nixos-hardware nixos-hardware] has example configurations for various types of hardware.
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===Other===
[[Category:Video]]
See the [https://wiki.archlinux.org/index.php/Hardware_video_acceleration#Application_support Arch Linux wiki].
Retrieved from "https://wiki.nixos.org/wiki/Accelerated_Video_Playback"