starting with opencv.txt

sudo apt-get remove ffmpeg x264 libx264-dev

sudo apt-get update

sudo apt-get install build-essential checkinstall git cmake libfaac-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 libxvidcore-dev texi2html yasm zlib1g-dev

sudo apt-get install libgstreamer0.10-0 libgstreamer0.10-dev gstreamer0.10-tools gstreamer0.10-plugins-base libgstreamer-plugins-base0.10-dev gstreamer0.10-plugins-good gstreamer0.10-plugins-ugly gstreamer0.10-plugins-bad gstreamer0.10-ffmpeg

sudo apt-get install libgtk2.0-0 libgtk2.0-dev

sudo apt-get install libjpeg8 libjpeg8-dev

download latest version of opencv from sourceforge

cd "the download folder of opencv"

cmake .

sudo make 

sudo make install