anchor.diff: -FROM ubuntu:trusty
  +FROM ampervue/python27
   
   # https://github.com/ampervue/docker-python27-opencv
   
  
positive.code: RUN rm -rf /usr/local/src
  # =================================
  
  # Install pip
  # =================================
  RUN curl --silent --show-error --retry 5 https://bootstrap.pypa.io/get-pip.py | python
  
negative.code: #   plus a bunch of build essencials
  #######################################
  
  ENV OPENCV_VERSION  2.4.10
  
  WORKDIR /usr/local/src
  
  RUN git clone --depth 1 https://github.com/l-smash/l-smash \
     && git clone --depth 1 git://git.videolan.org/x264.git \
     && hg clone https://bitbucket.org/multicoreware/x265 \
     && git clone --depth 1 git://source.ffmpeg.org/ffmpeg \
     && git clone https://github.com/Itseez/opencv.git \
     && git clone --depth 1 git://github.com/mstorsjo/fdk-aac.git \
     && git clone --depth 1 https://chromium.googlesource.com/webm/libvpx \
     && git clone --depth 1 git://git.opus-codec.org/opus.git \
     && git clone --depth 1 https://github.com/mulx/aacgain.git
  
  # Build L-SMASH
  # =================================
  