For Fedora users the oneliner command to install all dependencies will not work because the packages are named differently.
For using the Build Script, here is my command to install all dependencies on a fresh f15 install:
sudo yum install qt-devel yasm-devel kdelibs-devel SDL-devel SDL_image-devel libxml2-devel recordmydesktop dvgrab libdv-devel libdc1394-devel x264 x264-devel x264-libs libtheora-devel xvidcore-devel libogg-devel libvorbis-devel dirac-devel lame-devel libquicktime-devel faac-devel faad2-devel gsm-devel opencore-amr-devel libsamplerate-devel jack-audio-connection-kit-devel sox sox-devel ladspa-devel ladspa-swh-plugins libmad-devel gdk-pixbuf2-devel pango-devel gtk2-devel qjson-devel
gdk-pixbuf will not be found by the Build Script resulting in an error while building. I resolved this Issue by symlinking the pixbuf include to the place where the Script will look for it after installing the dependencies. Although this may not be the best way, it works ;)
sudo ln -s /usr/include/gdk-pixbuf-2.0/gdk-pixbuf /usr/include/gtk-2.0/gdk-pixbuf
I hope this will make building kdenlive easier for Fedora users.