diff --git a/pkgs/applications/video/obs-studio/plugins/default.nix b/pkgs/applications/video/obs-studio/plugins/default.nix
index 63bad0fe6459..d3d1ceb2de6e 100644
--- a/pkgs/applications/video/obs-studio/plugins/default.nix
+++ b/pkgs/applications/video/obs-studio/plugins/default.nix
@@ -42,6 +42,8 @@
 
   obs-pipewire-audio-capture = callPackage ./obs-pipewire-audio-capture.nix { };
 
+  obs-replay-source = qt6Packages.callPackage ./obs-replay-source.nix { };
+
   obs-rgb-levels-filter = callPackage ./obs-rgb-levels-filter.nix { };
 
   obs-scale-to-sound = callPackage ./obs-scale-to-sound.nix { };
diff --git a/pkgs/applications/video/obs-studio/plugins/obs-replay-source.nix b/pkgs/applications/video/obs-studio/plugins/obs-replay-source.nix
new file mode 100644
index 000000000000..994a56d4c86d
--- /dev/null
+++ b/pkgs/applications/video/obs-studio/plugins/obs-replay-source.nix
@@ -0,0 +1,40 @@
+{ stdenv
+, lib
+, fetchFromGitHub
+, cmake
+, libcaption
+, obs-studio
+, qtbase
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "obs-replay-source";
+  version = "1.6.12";
+
+  src = fetchFromGitHub {
+    owner = "exeldro";
+    repo = "obs-replay-source";
+    rev = finalAttrs.version;
+    sha256 = "sha256-MzugH6r/jY5Kg7GIR8/o1BN36FenBzMnqrPUceJmbPs=";
+  };
+
+  nativeBuildInputs = [ cmake ];
+  buildInputs = [ libcaption obs-studio qtbase ];
+
+  postInstall = ''
+    mkdir -p "$out/lib" "$out/share"
+    mv "$out/obs-plugins/64bit" "$out/lib/obs-plugins"
+    rm -rf "$out/obs-plugins"
+    mv "$out/data" "$out/share/obs"
+  '';
+
+  dontWrapQtApps = true;
+
+  meta = with lib; {
+    description = "Replay source for OBS studio";
+    homepage = "https://github.com/exeldro/obs-replay-source";
+    license = licenses.gpl2Only;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ pschmitt ];
+  };
+})
diff --git a/pkgs/development/libraries/libcaption/default.nix b/pkgs/development/libraries/libcaption/default.nix
new file mode 100644
index 000000000000..78cf5214051d
--- /dev/null
+++ b/pkgs/development/libraries/libcaption/default.nix
@@ -0,0 +1,30 @@
+{ stdenv
+, lib
+, fetchFromGitHub
+, cmake
+, re2c
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "libcaption";
+  version = "0.7";
+
+  src = fetchFromGitHub {
+    owner = "szatmary";
+    repo = "libcaption";
+    rev = finalAttrs.version;
+    sha256 = "sha256-OBtxoFJF0cxC+kfSK8TIKIdLkmCh5WOJlI0fejnisJo=";
+    fetchSubmodules = true;
+  };
+
+  nativeBuildInputs = [ cmake ];
+  buildInputs = [ re2c ];
+
+  meta = with lib; {
+    description = "Free open-source CEA608 / CEA708 closed-caption encoder/decoder";
+    homepage = "https://github.com/szatmary/libcaption";
+    license = licenses.mit;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ pschmitt ];
+  };
+})
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 1173079caaec..1a4a3b1f8abc 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -22533,6 +22533,8 @@ with pkgs;
     then pkgs.libcanberra
     else pkgs.libcanberra-gtk2;
 
+  libcaption = callPackage ../development/libraries/libcaption { };
+
   libcbor = callPackage ../development/libraries/libcbor { };
 
   libccd = callPackage ../development/libraries/libccd { };