compiling opencv-2.4.11 with python2.7.6 and ffmpeg version git-2015-03-21

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I am on Centos 6.5 64bit

I get error when compiling opencv-2.4.11 with python2.7.6 and ffmpeg version git-2015-03-21

after CMAKE I get

--     Precompiled headers:         YES
--
--   OpenCV modules:
--     To be built:                 core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu nonfree contrib python stitching superres ts videostab
--     Disabled:                    world
--     Disabled by dependency:      -
--     Unavailable:                 androidcamera dynamicuda java ocl viz
--
--   GUI:
--     QT:                          NO
--     GTK+ 2.x:                    NO
--     GThread :                    NO
--     GtkGlExt:                    NO
--     OpenGL support:              NO
--     VTK support:                 NO
--
--   Media I/O:
--     ZLib:                        /usr/lib64/libz.so (ver 1.2.3)
--     JPEG:                        /usr/lib64/libjpeg.so (ver )
--     PNG:                         /usr/lib64/libpng.so (ver 1.2.49)
--     TIFF:                        /usr/lib64/libtiff.so (ver 42 - 3.9.4)
--     JPEG 2000:                   /usr/lib64/libjasper.so (ver 1.900.1)
--     OpenEXR:                     NO
--
--   Video I/O:
--     DC1394 1.x:                  NO
--     DC1394 2.x:                  NO
--     FFMPEG:                      YES
--       codec:                     YES (ver 56.29.100)
--       format:                    YES (ver 56.26.101)
--       util:                      YES (ver 54.20.100)
--       swscale:                   YES (ver 3.1.101)
--       gentoo-style:              YES
--     GStreamer:                   NO
--     OpenNI:                      NO
--     OpenNI PrimeSensor Modules:  NO
--     PvAPI:                       NO
--     GigEVisionSDK:               NO
--     UniCap:                      NO
--     UniCap ucil:                 NO
--     V4L/V4L2:                    NO/NO
--     XIMEA:                       NO
--     Xine:                        NO
--
--   Other third-party libraries:
--     Use IPP:                     NO
--     Use Eigen:                   YES (ver 3.2.3)
--     Use TBB:                     NO
--     Use OpenMP:                  NO
--     Use GCD                      NO
--     Use Concurrency              NO
--     Use C=:                      NO
--     Use Cuda:                    NO
--     Use OpenCL:                  NO
--
--   Python:
--     Interpreter:                 /usr/local/bin/python2.7 (ver 2.7.6)
--     Libraries:                   /usr/local/lib/python2.7/config/libpython2.7.a (ver 2.7.6)
--     numpy:                       /usr/local/lib/python2.7/site-packages/numpy/core/include (ver )
--     packages path:               /usr/local/lib/python2.7/site-packages
--
--   Java:
--     ant:                         NO
--     JNI:                         NO
--     Java tests:                  NO
--
--   Tests and samples:
--     Tests:                       NO
--     Performance tests:           NO
--     C/C++ Examples:              NO
--
--   Install path:                  /usr/local
--
--   cvconfig.h is in:              /home/bob/tmp/opencv-2.4.11/build
-- -----------------------------------------------------------------
--
-- Configuring done
-- Generating done

after make

bob@localhost~/tmp/opencv-2.4.11/build $ make
[  1%] Built target opencv_core_pch_dephelp
[  1%] Built target pch_Generate_opencv_core
[  6%] Built target opencv_core
[------]
[ 77%] Built target pch_Generate_opencv_contrib
[ 83%] Built target opencv_contrib
Linking CXX shared library ../../lib/cv2.so
/usr/bin/ld: cannot find -lavcodec
collect2: ld returned 1 exit status
make[2]: *** [lib/cv2.so] Error 1
make[1]: *** [modules/python/CMakeFiles/opencv_python.dir/all] Error 2
make: *** [all] Error 2

why the hell lavcodec is missing?.. /usr/bin/ld: cannot find -lavcodec

ffmpeg is built by the instructions here