diff --git a/overlays/ffmpeg-foodogsquared/add-custom-filters.patch b/overlays/ffmpeg-foodogsquared/add-custom-filters.patch
index b1323546..4887ab71 100644
--- a/overlays/ffmpeg-foodogsquared/add-custom-filters.patch
+++ b/overlays/ffmpeg-foodogsquared/add-custom-filters.patch
@@ -1,26 +1,26 @@
 diff --git a/libavfilter/Makefile b/libavfilter/Makefile
-index a90ca30ad7..c0fc73be46 100644
+index 30cc329fb6..02b4c75470 100644
 --- a/libavfilter/Makefile
 +++ b/libavfilter/Makefile
-@@ -367,6 +367,7 @@ OBJS-$(CONFIG_YADIF_FILTER)                  += vf_yadif.o
+@@ -549,6 +549,8 @@ OBJS-$(CONFIG_YAEPBLUR_FILTER)               += vf_yaepblur.o
  OBJS-$(CONFIG_ZMQ_FILTER)                    += f_zmq.o
  OBJS-$(CONFIG_ZOOMPAN_FILTER)                += vf_zoompan.o
  OBJS-$(CONFIG_ZSCALE_FILTER)                 += vf_zscale.o
-+OBJS-$(CONFIG_GLTRANSITION_FILTER)           += vf_gltransition.o
-+OBJS-$(CONFIG_SHADERTOY_FILTER)              += vf_shadertoy.o
++OBJS-$(CONFIG_GLTRANSITION_FILTER)			 += vf_gltransition.o
++OBJS-$(CONFIG_SHADERTOY_FILTER)			 	 += vf_shadertoy.o
  
  OBJS-$(CONFIG_ALLRGB_FILTER)                 += vsrc_testsrc.o
  OBJS-$(CONFIG_ALLYUV_FILTER)                 += vsrc_testsrc.o
 diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
-index 6eac828616..0570c1c2aa 100644
+index 5ebacfde27..9053f030fb 100644
 --- a/libavfilter/allfilters.c
 +++ b/libavfilter/allfilters.c
-@@ -357,6 +357,7 @@ extern AVFilter ff_vf_yadif;
+@@ -516,6 +516,8 @@ extern const AVFilter ff_vf_yaepblur;
  extern const AVFilter ff_vf_zmq;
  extern const AVFilter ff_vf_zoompan;
  extern const AVFilter ff_vf_zscale;
 +extern const AVFilter ff_vf_gltransition;
 +extern const AVFilter ff_vf_shadertoy;
-
+ 
  extern const AVFilter ff_vsrc_allrgb;
  extern const AVFilter ff_vsrc_allyuv;
diff --git a/overlays/ffmpeg-foodogsquared/default.nix b/overlays/ffmpeg-foodogsquared/default.nix
index 8ed6e7c0..571a950f 100644
--- a/overlays/ffmpeg-foodogsquared/default.nix
+++ b/overlays/ffmpeg-foodogsquared/default.nix
@@ -5,25 +5,43 @@ let
     owner = "transitive-bullshit";
     repo = "ffmpeg-gl-transition";
     rev = "3639b521aafb30b185de281f94560f298a22d420";
-    hash = "";
+    hash = "sha256-py6NVXw3giiRAcVRzsgxU8aKJZInWrubIUT2vOhfuco=";
+    name = "ffmpeg-gltransition";
   };
 
-  ffmpegShadertoyFilter = prev.fetchFromGitLab {
+  ffmpegShadertoy = prev.fetchFromGitLab {
     owner = "kriwkrow";
     repo = "ffmpeg_shadertoy_filter";
     rev = "eb297df10a104cae2d4ef3f70188d1e84f104532";
-    hash = "";
+    hash = "sha256-Qy5sZgNF/0uNCosj2NZEvyssXU9ln6ZsDjnt/orpt1k=";
+    name = "ffmpeg-shadertoy";
   };
 in
 {
   ffmpeg-foodogsquared = prev.ffmpeg-full.overrideAttrs (finalAttrs: prevAttrs: {
     pname = "ffmpeg-foodogsquared";
+    srcs = [
+      prevAttrs.src
+      ffmpegGLTransitions
+      ffmpegShadertoy
+    ];
+    buildInputs = prevAttrs.buildInputs ++ (with prev; [
+      libGLU
+      glew
+    ]);
+    sourceRoot = ".";
     patches = prevAttrs.patches ++ [
       ./add-custom-filters.patch
+      ./update-ffmpeg-opengltransition.patch
     ];
-    postPatch = prevAttrs.postPatch + ''
-      cp ${ffmpegGLTransitions}/vf_gltransition.c $src/libavfilter
-      cp ${ffmpegShadertoyFilter}/vf_shadertoy.c $src/libavfilter
+    postUnpack = ''
+      cd ./${ffmpegGLTransitions.name}
+      cd ../
+
+      cp --no-preserve=mode ./${ffmpegGLTransitions.name}/vf_gltransition.c ./ffmpeg/libavfilter
+      cp --no-preserve=mode ./${ffmpegShadertoy.name}/vf_shadertoy.c ./ffmpeg/libavfilter
+
+      cd ffmpeg
     '';
   });
 }
diff --git a/overlays/ffmpeg-foodogsquared/update-ffmpeg-opengltransition.patch b/overlays/ffmpeg-foodogsquared/update-ffmpeg-opengltransition.patch
new file mode 100644
index 00000000..8b277231
--- /dev/null
+++ b/overlays/ffmpeg-foodogsquared/update-ffmpeg-opengltransition.patch
@@ -0,0 +1,20 @@
+diff --git a/libavfilter/vf_gltransition.c b/libavfilter/vf_gltransition.c
+--- a/libavfilter/vf_gltransition.c
++++ b/libavfilter/vf_gltransition.c
+@@ -133,7 +133,6 @@ static const AVOption gltransition_options[] = {
+   { "duration", "transition duration in seconds", OFFSET(duration), AV_OPT_TYPE_DOUBLE, {.dbl=1.0}, 0, DBL_MAX, FLAGS },
+   { "offset", "delay before startingtransition in seconds", OFFSET(offset), AV_OPT_TYPE_DOUBLE, {.dbl=0.0}, 0, DBL_MAX, FLAGS },
+   { "source", "path to the gl-transition source file (defaults to basic fade)", OFFSET(source), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
+-  {NULL}
+ };
+ 
+ FRAMESYNC_DEFINE_CLASS(gltransition, GLTransitionContext, fs);
+@@ -570,7 +569,7 @@ AVFilter ff_vf_gltransition = {
+   .preinit       = gltransition_framesync_preinit,
+   .init          = init,
+   .uninit        = uninit,
+-  .query_formats = query_formats,
++  .query_formats = FILTER_QUERY_FUNC(query_formats),
+   .activate      = activate,
+   .inputs        = gltransition_inputs,
+   .outputs       = gltransition_outputs,