mlt: add glaxnimate support

pkgs/applications/kde/kdenlive/default.nix

@@ -34,6 +34,8 @@
 , kpurpose
 , kdeclarative
 , wrapGAppsHook3
+, glaxnimate
+, enableGlaxnimate ? true
 }:
 
 let
@@ -80,15 +82,18 @@ mkDerivation {
     kpurpose
     kdeclarative
     wrapGAppsHook3
-  ];
+  ] ++ lib.optional enableGlaxnimate glaxnimate;
   # Both MLT and FFMpeg paths must be set or Kdenlive will complain that it
   # doesn't find them. See:
   # https://github.com/NixOS/nixpkgs/issues/83885
-  patches = [ ./dependency-paths.patch ];
+  patches = [ ./dependency-paths.patch ] ++ lib.optional enableGlaxnimate ./dependency-paths-glaxnimate.patch;
 
-  inherit mediainfo;
-  ffmpeg = ffmpeg-full;
-  mlt = mlt-full;
+  # Needed to replace @glaxnimate@ by its path
+  env = {
+    inherit mediainfo glaxnimate;
+    ffmpeg = ffmpeg-full;
+    mlt = mlt-full;
+  };
 
   postPatch =
     # Module Qt5::Concurrent must be included in `find_package` before it is used.

pkgs/applications/kde/kdenlive/dependency-paths-glaxnimate.patch

@@ -0,0 +1,13 @@
+diff --git a/src/kdenlivesettings.kcfg b/src/kdenlivesettings.kcfg
+index 86fa5ef..6aeccbe 100644
+--- a/src/kdenlivesettings.kcfg
++++ b/src/kdenlivesettings.kcfg
+@@ -657,7 +657,7 @@
+
+     <entry name="glaxnimatePath" type="String">
+       <label>Path to the Glaxnimate application.</label>
+-      <default></default>
++      <default>@glaxnimate@/bin/glaxnimate</default>
+     </entry>
+
+     <entry name="nice_tasks" type="Bool">

pkgs/development/libraries/mlt/default.nix

@@ -36,6 +36,8 @@
 , enableSDL2 ? true
 , SDL2
 , gitUpdater
+, enableGlaxnimate ? true
+, libarchive
 }:
 
 stdenv.mkDerivation rec {
@@ -46,7 +48,11 @@ stdenv.mkDerivation rec {
     owner = "mltframework";
     repo = "mlt";
     rev = "v${version}";
-    hash = "sha256-nQ9uRip6i9+/MziU4gQq1ah712J6f94cFQWTDYRjzyE=";
+    hash = "sha256-rs02V6+9jMF0S78rCCXcDn3gzghqnOtWEHMo/491JxA=";
+    # The submodule contains glaxnimate code, since MLT uses internally some functions defined in glaxnimate.
+    # Since glaxnimate is not available as a library upstream, we cannot remove for now this dependency on
+    # submodules until upstream exports glaxnimate as a library: https://gitlab.com/mattbas/glaxnimate/-/issues/545
+    fetchSubmodules = true;
   };
 
   nativeBuildInputs = [
@@ -94,6 +100,8 @@ stdenv.mkDerivation rec {
     SDL
   ] ++ lib.optionals enableSDL2 [
     SDL2
+  ] ++ lib.optionals enableGlaxnimate [
+    libarchive
   ];
 
   outputs = [ "out" "dev" ];
@@ -106,6 +114,8 @@ stdenv.mkDerivation rec {
     "-DSWIG_PYTHON=ON"
   ] ++ lib.optionals (qt != null) [
     "-DMOD_QT${lib.versions.major qt.qtbase.version}=ON"
+  ] ++ lib.optionals enableGlaxnimate [
+    "-DMOD_GLAXNIMATE=ON"
   ];
 
   preFixup = ''