A shell.nix that runs OpenSeeFace automatically on anything that can run Nix. Great for use with VSeeFace!

alsoshell.nix

let
  pkgs = import <nixpkgs> {};
in pkgs.mkShell {
  packages = [
    (pkgs.python3.withPackages (python-pkgs: [
      python-pkgs.onnxruntime
      python-pkgs.opencv4
      python-pkgs.pillow
      python-pkgs.numpy
    ]))
    pkgs.git
  ];
  shellHook = ''
    if [ -d "OpenSeeFace" ]; then
      echo "Updating OpenSeeFace"
      cd OpenSeeFace
      git pull
    else
      echo "Cloning OpenSeeFace"
      git clone https://github.com/emilianavt/OpenSeeFace.git
      cd OpenSeeFace
    fi
    python facetracker.py -c 0 -W 1280 -H 720 -F 20 --discard-after 0 --scan-every 0 --no-3d-adapt 1 --max-feature-updates 900 --ip 127.0.0.1 --port 11573
    exit
  '';
}

flake.nix

{
  description = "OpenSeeFace development environment";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = nixpkgs.legacyPackages.${system};
        pythonEnv = pkgs.python3.withPackages (python-pkgs: with python-pkgs; [
          onnxruntime
          opencv4
          pillow
          numpy
        ]);
      in
      {
        devShells.default = pkgs.mkShell {
          packages = [
            pythonEnv
            pkgs.git
          ];

          shellHook = ''
            if [ -d "OpenSeeFace" ]; then
              echo "Updating OpenSeeFace"
              cd OpenSeeFace
              git pull
            else
              echo "Cloning OpenSeeFace"
              git clone https://github.com/emilianavt/OpenSeeFace.git
              cd OpenSeeFace
            fi
            python facetracker.py -c 0 -W 1280 -H 720 -F 20 --discard-after 0 --scan-every 0 --no-3d-adapt 1 --max-feature-updates 900 --ip 127.0.0.1 --port 11573
            exit
          '';
        };
      });
}

shell.nix

let
  pkgs = import <nixpkgs> {};
in pkgs.mkShell {
  packages = [
    (pkgs.python3.withPackages (python-pkgs: [
      python-pkgs.onnxruntime
      python-pkgs.opencv4
      python-pkgs.pillow
      python-pkgs.numpy
    ]))
  ];
  shellHook = ''
    python facetracker.py -c 0 -W 1280 -H 720 -F 20 --discard-after 0 --scan-every 0 --no-3d-adapt 1 --max-feature-updates 900 --ip 127.0.0.1 --port 11573
    exit
  '';
}

alsoshell.nix will also download and keep up to date OpenSeeFace. shell.nix will simply run it from the current directory.

Both are run by simply typing nix-shell.