packaging/rpm: Enable FFmpeg support on Fedora 36+ and RHEL 9+

Since Fedora Linux 36, an FFmpeg implementation is provided
in the base distribution as "ffmpeg-free". This implementation
is sufficient for building FreeRDP with FFmpeg support.

This implementation is also available in Fedora Extra Packages
for Enterprise Linux (EPEL) for Red Hat Enterprise Linux 9
and derivatives.

Thus, enable FFmpeg support when building for those distributions.

packaging/rpm/freerdp-nightly.spec

@@ -89,6 +89,10 @@ BuildRequires: wayland-devel
 BuildRequires: libwayland-client-devel
 %endif
 
+%if 0%{?fedora} >= 36 || 0%{?rhel} >= 9
+BuildRequires: ffmpeg-free-devel
+%endif
+
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 
 %description
@@ -119,7 +123,7 @@ cp %{_topdir}/SOURCES/source_version freerdp-nightly-%{version}/.source_version
         -DWITH_CUPS=ON \
         -DWITH_PCSC=ON \
         -DWITH_JPEG=ON \
-%if %{defined suse_version}
+%if 0%{?fedora} >= 36 || 0%{?rhel} >= 9 || 0%{?suse_version}
         -DWITH_FFMPEG=ON \
         -DWITH_DSP_FFMPEG=ON \
 %endif