install ffmpeg on ubuntu 14.04

gistfile1.sh

sudo su
echo  "deb http://www.deb-multimedia.org testing main" >> /etc/apt/sources.list
exit
sudo apt-get update
sudo apt-get install deb-multimedia-keyring

sudo apt-get remove ffmpeg x264 libx264-dev

sudo apt-get update

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 libx264-dev

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