Installing OpenCV with ffmpeg

Making it work took some time and effort and repetition owing to the 4 nodes being individually separate entities. Here's what we and the ffmpeg and opencv tarballs had to go through

1. untar ffmpeg
2. ./configure --enable-shared --enable-swscale --enable-gpl
3. make
4. sudo make install
5. untar opencv
6. sudo apt-get install patch ;if not already installed
   
7. patch otherlibs/highgui/cvcap_ffmpeg.cpp ../nfs/opencv-1.0.0-cvcapffmpegundefinedsymbols.patch
8. #4 from the page http://www.rainsoft.de/projects/ffmpeg_opencv.html
9. su
   cd /usr/local/include/
   mkdir ffmpeg
   cp libavcodec/* ffmpeg/
   cp libavdevice/* ffmpeg/
   cp libavformat/* ffmpeg/
   cp libavutil/* ffmpeg/
   cp libswscale/* ffmpeg/
   exit
10. change FFMPEGLIBS="-lavcodec -lavformat" to FFMPEGLIBS="-lavcodec -lavformat -lswscale" in configure
    
11. ./configure --enable-shared
12. make
13. sudo make install
14. sudo ldconfig

Sandy instead made a patch file for both step #8 and #10 so if anyone ever reads this and needs them, can contact him.