Difference between revisions of "Accelerated Video Playback"

Latest revision as of 10:58, 6 April 2024

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).

This is done by adding relevant libva-related packages to the hardware.opengl.extraPackages option.

Additionally, the intel-vaapi-driver (previously vaapiIntel) package can be overridden to enable Intel's Hybrid Driver.

Intel users also can enable intel-media-driver. It can be used at runtime with LIBVA_DRIVER_NAME=iHD mpv ... for example, if you use Mic92's mpv settings below.

Sample configuration:

{
  ...
  nixpkgs.config.packageOverrides = pkgs: {
    intel-vaapi-driver = pkgs.intel-vaapi-driver.override { enableHybridCodec = true; };
  };
  hardware.opengl = {
    enable = true;
    extraPackages = with pkgs; [
      intel-media-driver # LIBVA_DRIVER_NAME=iHD
      intel-vaapi-driver # LIBVA_DRIVER_NAME=i965 (older but works better for Firefox/Chromium)
      libvdpau-va-gl
    ];
  };
  environment.sessionVariables = { LIBVA_DRIVER_NAME = "iHD"; }; # Force intel-media-driver
  ...
}

32 bit example:

hardware.opengl.extraPackages32 = with pkgs.pkgsi686Linux; [ intel-vaapi-driver ];

Prepared Hardware configuration

Sometimes different opengl packages are required to achieve full performance. You can check different configuration repositories for similar hardware configuration:

The NixOS-Hardware Repository

Testing your configuration

You can test your configuration by running: nix-shell -p libva-utils --run vainfo

See Hardware video acceleration: Verification (Arch Wiki) for more information.

Applications

Chromium

See Chromium.

Firefox

See Firefox#Hardware_video_acceleration (ArchWiki).

MPV

You can place the following configuration in ~/.config/mpv/mpv.conf for mpv to use hardware acceleration for VP9 on Intel Broadwell (and probably later):

hwdec=auto-safe
vo=gpu
profile=gpu-hq

With Wayland, you need to nudge mpv to do the right thing:

gpu-context=wayland

This is based on the Arch Linux mpv article.

Other

See the Arch Linux wiki.

@@ Line 3: / Line 3: @@
 This is done by adding relevant <code>libva</code>-related packages to the <code>hardware.opengl.extraPackages</code> option.
-Additionally, the <code>vaapiIntel</code> package can be overriden to enable [https://github.com/01org/intel-hybrid-driver Intel's Hybrid Driver].
+Additionally, the <code>intel-vaapi-driver</code> (previously <code>vaapiIntel</code>) package can be overridden to enable [https://github.com/01org/intel-hybrid-driver Intel's Hybrid Driver].
 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.
@@ Line 12: / Line 12: @@
    ...
    nixpkgs.config.packageOverrides = pkgs: {
-     vaapiIntel = pkgs.vaapiIntel.override { enableHybridCodec = true; };
+     intel-vaapi-driver = pkgs.intel-vaapi-driver.override { enableHybridCodec = true; };
    };
    hardware.opengl = {
      enable = true;
      extraPackages = with pkgs; [
-       vaapiIntel
+       intel-media-driver # LIBVA_DRIVER_NAME=iHD
-       vaapiVdpau
+       intel-vaapi-driver # LIBVA_DRIVER_NAME=i965 (older but works better for Firefox/Chromium)
        libvdpau-va-gl
-      intel-media-driver # only available starting nixos-19.03 or the current nixos-unstable
      ];
    };
+  environment.sessionVariables = { LIBVA_DRIVER_NAME = "iHD"; }; # Force intel-media-driver
    ...
 }
 </syntaxHighlight>
+bit example:
+<syntaxhighlight lang="nix">
+hardware.opengl.extraPackages32 = with pkgs.pkgsi686Linux; [ intel-vaapi-driver ];
+</syntaxhighlight>
 == Prepared Hardware configuration ==
 Sometimes different opengl packages are required to achieve full performance. You can check different configuration repositories for similar hardware configuration:
 * [https://github.com/NixOS/nixos-hardware The NixOS-Hardware Repository]
+== Testing your configuration ==
+You can test your configuration by running: <code>nix-shell -p libva-utils --run vainfo</code>
+See [https://wiki.archlinux.org/index.php/Hardware_video_acceleration#Verification Hardware video acceleration: Verification (Arch Wiki)] for more information.
 == Applications ==
 ===Chromium===
-Chromium builds from nixpkgs now support vaapi by default. It can be disabled via a flag in about:config. (see: https://github.com/NixOS/nixpkgs/pull/57837 and https://github.com/NixOS/nixpkgs/commit/60e2d2ce2bd8c36c6e6f5152bea2d78ebab58f8b)
+See [https://nixos.wiki/wiki/Chromium#Enable_GPU_accelerated_video_decoding_.28VA-API.29 Chromium].
+=== Firefox ===
+See [https://wiki.archlinux.org/index.php/Firefox#Hardware_video_acceleration Firefox#Hardware_video_acceleration (ArchWiki)].
 ===[[MPV]]===
-@Mic92 needed the following configuration in <code>~/.mpv/config</code>
+You can place the following configuration in <code>~/.config/mpv/mpv.conf</code>
-for mpv to use hardware acceleration for VP9 on Intel Broadwell:
+for mpv to use hardware acceleration for VP9 on Intel Broadwell (and probably later):
 <syntaxHighlight lang=ini>
-hwdec=vaapi
+hwdec=auto-safe
 vo=gpu
-hwdec-codecs=all
+profile=gpu-hq
 </syntaxHighlight>
@@ Line 52: / Line 68: @@
 </syntaxHighlight>
-This is based on the [https://wiki.archlinux.org/index.php/Mpv#Hardware_decoding archlinux MPV article].
+This is based on the [https://wiki.archlinux.org/title/mpv#Hardware_video_acceleration Arch Linux mpv article].
 ===Other===
 See the [https://wiki.archlinux.org/index.php/Hardware_video_acceleration#Application_support Arch Linux wiki].

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