install the ffmpeg that actually works

ffmpeg_install.sh

# tested on ubuntu1204
# http://askubuntu.com/questions/148554/installingffmpeg-libx264-and-libavfilter


# remove the packages in the repo
sudo apt-get remove ffmpeg x264 libx264-dev

sudo apt-get update

# make sure this is successfully installed
apt-get install libfaac-dev

sudo apt-get -y install build-essential checkinstall git libfaac-dev libgpac-dev \
  libjack-jackd2-dev libmp3lame-dev libopencore-amrnb-dev libopencore-amrwb-dev \
  libsdl1.2-dev libtheora-dev libva-dev libvdpau-dev libvorbis-dev libx11-dev \
  libxfixes-dev texi2html yasm zlib1g-dev

# Then, for x264:

cd
git clone git://git.videolan.org/x264
cd x264
./configure --enable-static
make
sudo checkinstall --pkgname=x264 --pkgversion="3:$(./version.sh | awk -F'[" ]' '/POINT/{print $4"+git"$5}')" --backup=no --deldoc=yes \
  --fstrans=no --default

# And for FFmpeg:

cd
git clone --depth 1 git://source.ffmpeg.org/ffmpeg
cd ffmpeg
./configure --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb \
  --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis \
  --enable-libx264 --enable-nonfree --enable-version3 --enable-x11grab
make
sudo checkinstall --pkgname=ffmpeg --pkgversion="5:$(date +%Y%m%d%H%M)-git" --backup=no \
  --deldoc=yes --fstrans=no --default
hash x264 ffmpeg ffplay ffprobe

#That's it — filters should be automatically included.