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).
<languages/>
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<!--T:1-->
Accelerated video playback in NixOS is generally done by adding relevant packages to {{nixos:option|hardware.opengl.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 = { # hardware.opengl in 24.05 and older
  nixpkgs.config.packageOverrides = pkgs: {
    vaapiIntel = pkgs.vaapiIntel.override { enableHybridCodec = true; };
  };
  hardware.opengl = {
     enable = true;
     enable = true;
     extraPackages = with pkgs; [
     extraPackages = with pkgs; [
       vaapiIntel
       intel-media-driver # For Broadwell (2014) or newer processors. LIBVA_DRIVER_NAME=iHD
      vaapiVdpau
       intel-vaapi-driver # For older processors. LIBVA_DRIVER_NAME=i965
      libvdpau-va-gl
       intel-media-driver # only available starting nixos-19.03 or the current nixos-unstable
     ];
     ];
   };
   };
   ...
   environment.sessionVariables = { LIBVA_DRIVER_NAME = "iHD"; }; # Optionally, set the environment variable
}
}
</syntaxHighlight>
</nowiki>}}
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<!--T:2-->
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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== Prepared Hardware configuration ==
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Sometimes different opengl packages are required to achieve full performance. You can check different configuration repositories for similar hardware configuration:
<!--T:3-->
* [https://github.com/NixOS/nixos-hardware The NixOS-Hardware Repository]
For 32-bit support, use
</translate> {{nixos:option|hardware.graphics.extraPackages32}}:
{{file|/etc/nixos/configuration.nix|nix|<nowiki>
{
  # hardware.opengl.extraPackages32 in 24.05
  hardware.graphics.extraPackages32 = with pkgs.pkgsi686Linux; [ intel-vaapi-driver ];
}
</nowiki>}}
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=== AMD === <!--T:4-->


== Applications ==
<!--T:5-->
 
AMD configuration (at least for Ryzen 5 iGPUs) works out of the box:
===Chromium===
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Needs a patch for VA-API support, see [https://github.com/NixOS/nixpkgs/issues/21481 nixpkgs#21481] for current status.
{{file|/etc/nixos/configuration.nix|nix|<nowiki>
{
  hardware.opengl.enable = true;
}
</nowiki>}}
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== Testing your configuration == <!--T:6-->


===MPV===
<!--T:7-->
@Mic92 needed the following configuration in <code>~/.mpv/config</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:
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<!--T:8-->
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-->


<!--T:12-->
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=vaapi
hwdec=auto-safe
gpu-context=wayland
vo=gpu
vo=gpu
hwdec-codecs=all
profile=gpu-hq
</syntaxHighlight>
gpu-context=wayland ; On wayland only
 
With Wayland, you need to nudge mpv to do the right thing:
 
<syntaxHighlight lang=ini>
gpu-context=wayland
</syntaxHighlight>
</syntaxHighlight>


This is based on the [https://wiki.archlinux.org/index.php/Mpv#Hardware_decoding archlinux MPV article].
<!--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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<!--T:16-->
== 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].

Latest revision as of 14:05, 21 August 2024

Accelerated video playback in NixOS is generally done by adding relevant packages to hardware.opengl.extraPackages.

Installation

Intel

/etc/nixos/configuration.nix
{
  hardware.graphics = { # hardware.opengl in 24.05 and older 
    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
}

Note, intel-vaapi-driver still performs better for browsers (gecko/chromium based) on newer Skylake (2015) processors.[1]

For 32-bit support, use hardware.graphics.extraPackages32:

/etc/nixos/configuration.nix
{
  # hardware.opengl.extraPackages32 in 24.05
  hardware.graphics.extraPackages32 = with pkgs.pkgsi686Linux; [ intel-vaapi-driver ];
}

AMD

AMD configuration (at least for Ryzen 5 iGPUs) works out of the box:

/etc/nixos/configuration.nix
{
  hardware.opengl.enable = true;
}

Testing your configuration

You can test your configuration by running: nix-shell -p libva-utils --run vainfo See Arch Linux wiki#Hardware video acceleration for more information.

Applications

Chromium

See 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