echo "deb http://www.deb-multimedia.org wheezy main non-free" >> /etc/apt/sources.list
echo "deb-src http://www.deb-multimedia.org wheezy main non-free" >> /etc/apt/sources.list
apt-get update
apt-get install deb-multimedia-keyring # if this aborts, try again
apt-get update

# Go to local source directory
cd /usr/local/src

# Install all dependencies we'll need
aptitude install \
  -y                  \
  libfaad-dev         \
  faad                \
  faac                \
  libfaac0            \
  libfaac-dev         \
  libmp3lame-dev      \
  x264                \
  libx264-dev         \
  libxvidcore-dev     \
  build-essential     \
  checkinstall

# Install all build dependencies for ffmpeg
apt-get build-dep ffmpeg

# Get the actual ffmpeg source code
git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg

# Go into the ffmpeg source directory
cd ffmpeg-*

# Configure it
./configure \
--enable-gpl \
--enable-nonfree \
--enable-libfaac \
--enable-libgsm \
--enable-libmp3lame \
--enable-libtheora \
--enable-libvorbis \
--enable-libx264 \
--enable-libxvid \
--enable-zlib \
--enable-postproc \
--enable-swscale \
--enable-pthreads \
--enable-x11grab \
--enable-libdc1394 \
--enable-version3 \
--enable-libopencore-amrnb \
--enable-libopencore-amrwb

make
make install