Add patch to fix building with opencv disabled

0001-examples-only-check-opencv_dep-if-option-is-not-disa.patch

@@ -0,0 +1,32 @@
+From 9815fd1e2ab13f765b75b39e3764fe1e860cb251 Mon Sep 17 00:00:00 2001
+From: Adam Williamson <awilliam@redhat.com>
+Date: Thu, 10 Sep 2020 10:35:11 -0700
+Subject: [PATCH] examples: only check opencv_dep if option is not disabled
+ (#1406)
+
+We can't check opencv_dep if the option is disabled because it's
+never initialized in that case, since 833a65cc .
+
+Signed-off-by: Adam Williamson <awilliam@redhat.com>
+---
+ tests/examples/meson.build | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/tests/examples/meson.build b/tests/examples/meson.build
+index 2eba1d47e..a41fc1679 100644
+--- a/tests/examples/meson.build
++++ b/tests/examples/meson.build
+@@ -9,7 +9,9 @@ subdir('mpegts')
+ subdir('msdk')
+ subdir('mxf')
+ subdir('nvcodec')
+-subdir('opencv', if_found: opencv_dep)
++if not get_option('opencv').disabled()
++    subdir('opencv', if_found: opencv_dep)
++endif
+ subdir('uvch264')
+ subdir('va')
+ subdir('waylandsink')
+-- 
+2.28.0
+

gstreamer1-plugins-bad-free.spec

@@ -30,6 +30,10 @@ URL:            http://gstreamer.freedesktop.org/
 %endif
 Source0:        gst-plugins-bad-free-%{version}.tar.xz
 Source1:        gst-p-bad-cleanup.sh
+# Fix build failure with opencv disabled:
+# https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/issues/1406
+# https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1570
+Patch0:         0001-examples-only-check-opencv_dep-if-option-is-not-disa.patch
 
 BuildRequires:  meson >= 0.48.0
 BuildRequires:  gcc-c++
@@ -220,6 +224,7 @@ aren't tested well enough, or the code is not of good enough quality.
 
 %prep
 %setup -q -n gst-plugins-bad-%{version}
+%patch0 -p1
 
 %build
 %meson \