Reinstate cuda_sdk conditional

OBS-URL: https://build.opensuse.org/package/show/multimedia:libs/ffmpeg-5?expand=0&rev=12

ffmpeg-5.changes

@@ -11,7 +11,7 @@ Thu Mar 10 13:37:06 UTC 2022 - Bjørn Lie <bjorn.lie@gmail.com>
 - Drop pkgconfig(librtmp) BuildRequires and stop passing
   conditional --enable-librtmp to configure, built-in RTMP support
   is better, and has listen mode.
-- Drop bcond conditionals for cuda_sdk, libaom, srt, lv2, soxr,
+- Drop bcond conditionals for libaom, srt, lv2, soxr,
   zmq, zimg and openmpt, build unconditionally for all supported
   versions of openSUSE.
 - Drop pkgconfig(enca) BuildRequires: Seems unused.

ffmpeg-5.spec

@@ -37,6 +37,17 @@
 %preamble_string ffmpeg-private-devel %comparator %conflicts_version \
 %nil
 
+%if 0%{?BUILD_ORIG}
+%bcond_without cuda_sdk
+%else
+# If software H264 is disabled, the hw driver must be as well:
+# HW drivers can fail to initialize, namely when the hardware is absent.
+# Browsers choose video formats on sites like youtube based on `ffmpeg
+# -codecs` rather than the success/failure status of libav* initialization.
+# This becomes a problem when a format only has a HW driver;
+# the browser thinks it can do H264 but never succeeds.
+%bcond_with    cuda_sdk
+%endif
 %bcond_with    amrwb
 %bcond_with    fdk_aac_dlopen
 %bcond_with    opencore
@@ -543,6 +554,9 @@ LDFLAGS="%_lto_cflags" \
 	--enable-ladspa \
 %if %{with vulkan}
 	--enable-libshaderc --enable-vulkan \
+%endif
+%if !%{with cuda_sdk}
+	--disable-cuda-sdk \
 %endif
 	--enable-libaom \
 	--enable-libass \