Open Broadcast Software no Fedora 21

instalando dependências

yum install cmake gcc-c++ qt5-qtbase-devel qt5-qtx11extras-devel ffmpeg-compat-devel ffmpeg-devel jansson-devel libXinerama-devel  libXinerama libv4l-devel x264-devel libXcomposite-devel libgudev1-devel freetype-devel fontconfig-devel pulseaudio-libs-devel v4l-utils qt5-qtmultimedia-devel faac faac-devel gstreamer-plugins-bad gstreamer-plugins-ugly gstreamer-ffmpeg vlc libtool libtool

yum install @"C Development Tools and Libraries" git

compilando libfdk-aac

git clone https://github.com/ob-encoder/fdk-aac.git 
Run the following to configure:
autoreconf -i && ./configure --prefix=/usr --enable-shared 
Build and install with
make -j5 && sudo make install

compilando OBS - GiT

git clone https://github.com/jp9000/obs-studio.git
cd obs-studio && mkdir build && cd build
cmake -DUNIX_STRUCTURE=1 -DCMAKE_INSTALL_PREFIX=/usr ..
make -j
make install
ldconfig