Add installation dependencies

Signed-off-by: wei dong <weidong@uniontech.com>

srt.spec

@@ -1,6 +1,6 @@
 Name:           srt
 Version:        1.4.1
-Release:        3
+Release:        4
 Summary:        Secure Reliable Transport protocol tools
 
 License:        MPLv2.0
@@ -10,7 +10,7 @@ Source0:        https://github.com/Haivision/srt/archive/v%{version}/%{name}-%{v
 BuildRequires:  cmake gcc-c++
 BuildRequires:  gnutls-devel gmock-devel gtest-devel
 
-Requires: srt-libs%{?_isa} = %{version}-%{release}
+Requires: srt-libs%{?_isa} = %{version}-%{release} ffmpeg
 
 %description
 Secure Reliable Transport (SRT) is an open source transport technology that
@@ -81,5 +81,8 @@ make test \
 
 
 %changelog
+* Mon Sep 13 2021 weidong <weidong@uniontech.com> - 1.4.1-4
+- Add installation dependencies
+
 * Fri May 07 2021 weidong <weidong@uniontech.com> - 1.4.1-3
 - Initial package.