diff --git a/ffmpeg-4.changes b/ffmpeg-4.changes
index 719b42d..f3063ae 100644
--- a/ffmpeg-4.changes
+++ b/ffmpeg-4.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Thu Mar 17 21:44:30 UTC 2022 - Enrico Belleri <idesmi@protonmail.com>
+
+- Add ffmpeg-libglslang-detection.patch: detects libglslang
+- Enable Vulkan filters
+
 -------------------------------------------------------------------
 Sun Mar 13 15:20:53 UTC 2022 - Predrag Ivanović <predivan@mts.rs>
 
diff --git a/ffmpeg-4.spec b/ffmpeg-4.spec
index 5530c69..e568144 100644
--- a/ffmpeg-4.spec
+++ b/ffmpeg-4.spec
@@ -119,6 +119,7 @@ Patch5:         soversion.patch
 Patch8:         vmaf-trim-usr-local.patch
 Patch9:         ffmpeg-4.4-CVE-2020-22046.patch
 Patch10:        ffmpeg-chromium.patch
+Patch11:        ffmpeg-libglslang-detection.patch
 BuildRequires:  ladspa-devel
 BuildRequires:  libgsm-devel
 BuildRequires:  libmp3lame-devel
@@ -206,6 +207,9 @@ BuildRequires:  pkgconfig(vidstab) >= 0.98
 %endif
 %if %{with vulkan}
 BuildRequires:  pkgconfig(vulkan)
+BuildRequires:  pkgconfig(SPIRV-Tools)
+BuildRequires:  glslang-devel
+BuildRequires:  c++_compiler
 %endif
 BuildRequires:  pkgconfig(vorbis)
 BuildRequires:  pkgconfig(vpx) >= 1.4.0
@@ -627,6 +631,7 @@ LDFLAGS="%_lto_cflags" \
 	--enable-ladspa \
 %if %{with vulkan}
 	--enable-vulkan \
+	--enable-libglslang \
 %endif
 %if ! %{with cuda_sdk}
 	--disable-cuda-sdk \
diff --git a/ffmpeg-libglslang-detection.patch b/ffmpeg-libglslang-detection.patch
new file mode 100644
index 0000000..322f55a
--- /dev/null
+++ b/ffmpeg-libglslang-detection.patch
@@ -0,0 +1,18 @@
+Index: ffmpeg-4.4.1/configure
+===================================================================
+--- ffmpeg-4.4.1.orig/configure
++++ ffmpeg-4.4.1/configure
+@@ -6370,7 +6370,12 @@ enabled fontconfig        && enable libf
+ enabled libfontconfig     && require_pkg_config libfontconfig fontconfig "fontconfig/fontconfig.h" FcInit
+ enabled libfreetype       && require_pkg_config libfreetype freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
+ enabled libfribidi        && require_pkg_config libfribidi fribidi fribidi.h fribidi_version_info
+-enabled libglslang        && require_cpp libglslang glslang/SPIRV/GlslangToSpv.h "glslang::TIntermediate*" -lglslang -lMachineIndependent -lOSDependent -lHLSL -lOGLCompiler -lGenericCodeGen -lSPVRemapper -lSPIRV -lSPIRV-Tools-opt -lSPIRV-Tools -lpthread -lstdc++
++enabled libglslang && { check_lib libglslang glslang/Include/glslang_c_interface.h glslang_initialize_process \
++                            -lglslang -lMachineIndependent -lOSDependent -lHLSL -lOGLCompiler -lGenericCodeGen \
++                            -lSPVRemapper -lSPIRV -lSPIRV-Tools-opt -lSPIRV-Tools -lpthread -lstdc++ -lm ||
++                        require libglslang glslang/Include/glslang_c_interface.h glslang_initialize_process \
++                            -lglslang -lOSDependent -lHLSL -lOGLCompiler \
++                            -lSPVRemapper -lSPIRV -lSPIRV-Tools-opt -lSPIRV-Tools -lpthread -lstdc++ -lm; }
+ enabled libgme            && { check_pkg_config libgme libgme gme/gme.h gme_new_emu ||
+                                require libgme gme/gme.h gme_new_emu -lgme -lstdc++; }
+ enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do