Para obter qualquer plugin do Gstreamer específico do Ubuntu, acesse-o aqui: link
1) antes de construir a partir da fonte, tenha as bibliotecas dev
sudo apt-get install faad libfaad-dev libfaac-dev
2) remover faad antigo existente
dpkg --list | grep gstreamer
sudo apt-get remove gstreamer0.10-plugins-bad
3) instale o novo
wget http://gstreamer.freedesktop.org/src/gst-plugins-bad/gst-plugins-bad-0.10.23.tar.gz
tar xvfz gst-plugins-bad-0.10.23.tar.gz
./autogen.sh
./configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var --libexecdir=/usr/lib --with-package-name="GStreamer Bad" --with-package-origin="http://www.ubuntu.org/" --enable-gtk-doc --disable-static;
make
sudo make install