gnu: Add gnome-video-effects.

* gnu/packages/gnome.scm (gnome-video-effects): New public variable.

Signed-off-by: Andy Wingo <wingo@igalia.com>

gnu/packages/gnome.scm

@@ -6752,3 +6752,30 @@ (define-public lollypop
 from artists and tracks from the web.  It also fetches cover artworks
 automatically and it can stream songs from online music services and charts.")
     (license license:gpl3+)))
+
+(define-public gnome-video-effects
+  (package
+    (name "gnome-video-effects")
+    (version "0.4.3")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "mirror://gnome/sources/" name "/"
+                                  (version-major+minor version) "/" name "-"
+                                  version ".tar.xz"))
+              (sha256
+               (base32
+                "06c2f1kihyhawap1s3zg5w7q7fypsybkp7xry4hxkdz4mpsy0zjs"))))
+    (build-system glib-or-gtk-build-system)
+    (arguments
+     `(#:out-of-source? #f))
+    (native-inputs
+     `(("glib:bin" ,glib "bin")
+       ("intltool" ,intltool)
+       ("gettext" ,gettext-minimal)
+       ("pkg-config" ,pkg-config)))
+    (home-page "https://wiki.gnome.org/Projects/GnomeVideoEffects")
+    (synopsis "Video effects for Cheese and other GNOME applications")
+    (description
+     "A collection of GStreamer video filters and effects to be used in
+photo-booth-like software, such as Cheese.")
+    (license license:gpl2+)))