To install ffmpeg from source you will need.

export LD_LIBRARY_PATH=/usr/lib:/usr/local/lib

git clone git://github.com/mstorsjo/fdk-aac
cd fdk-aac
./configure --prefix=/usr --disable-shared
make
make install

CC=gcc CFLAGS=-m64 CXXFLAGS=-m64 LDFLAGS=-m64 ./configure --enable-static --enable-shared
make
make install

cp platform.inc platform.inc-org
Modify version line to
--version-script=libxvidcore.ld -z gnu-version-script-compat

CC=gcc CFLAGS=-m64 CXXFLAGS=-m64 LDFLAGS=-m64 ./configure --prefix=/usr
make
make install

Note: its possible that all new lib's need to link to /lib
./configure --prefix=/usr --disable-static --enable-shared --enable-pthreads --enable-ffserver --enable-libx264 --enable-libfdk-aac --enable-gpl --enable-nonfree --enable-libvorbis --enable-libtheora --enable-libmp3lame --enable-libxvid --enable-postproc --enable-libvpx
make
make install

To split audio from a video (dvd)
ffmpeg -i VTS_02_1.VOB -q:a 0 -map a /all/play/under_kingdom-5.mp3

Help Sources

Ffmpeg Ubuntu help
Compiling Ffmpeg

VLC setup
Note : you might need to modify versions in configure.ac, then run autoconf, aclocal & automake
pkg-config --modversion libavcodec
./configure CFLAGS=-m64 CXXFLAGS=-m64 LDFLAGS=-m64 CC=gcc --prefix=/opt/vlc
make
make install