Update obs-studio.spec

Signed-off-by: madomado <wboy111@outlook.com>

anda/apps/obs-studio/obs-studio.spec

@@ -23,7 +23,8 @@ BuildRequires:	desktop-file-utils
 BuildRequires:	alsa-lib-devel
 BuildRequires:	asio-devel
 BuildRequires:	fdk-aac-free-devel
-BuildRequires:	ffmpeg-devel
+# ffmpeg-devel is only in RPM Fusion
+BuildRequires:	ffmpeg-free-devel
 BuildRequires:	fontconfig-devel
 BuildRequires:	freetype-devel
 BuildRequires:	jansson-devel >= 2.5
@@ -59,6 +60,7 @@ BuildRequires:	swig
 BuildRequires:	systemd-devel
 BuildRequires:	wayland-devel
 BuildRequires:	websocketpp-devel
+# RPM Fusion only:
 BuildRequires:	x264-devel
 BuildRequires:	vlc-devel