Add banner

flake.nix

@@ -46,6 +46,16 @@
           -a enable-variance-boost=1 -a variance-boost-strength=3 -a enable-overlays=1 \
           -a enable-qm=1 -a qm-min=0 -a enable-tf=1 $src $out
       '';
+      banner = pkgs.runCommand "florp_banner.avif" {
+        src = ./media/florphd0001-0024.mp4;
+        nativeBuildInputs = with pkgs; [
+          libavif-svt
+          ffmpeg-headless
+        ];
+      } ''
+        ffmpeg -i $src -f yuv4mpegpipe -pix_fmt yuv420p - | \
+        avifenc -q 80 --speed 0 --depth 8 --yuv 420 -a tune=ssim --stdin $out
+      '';
       favicon = pkgs.runCommand "favicon.png" {
         src = ./media/florp_logo.png;
         nativeBuildInputs = with pkgs; [