anchor.diff:  
   # install opencv 3.2
   WORKDIR /
  +RUN wget https://github.com/opencv/opencv_contrib/archive/3.2.0.zip -O opencv_contrib-3.2.0.zip \
  +    && unzip opencv_contrib-3.2.0.zip
   RUN wget https://github.com/Itseez/opencv/archive/3.2.0.zip \
       && unzip 3.2.0.zip \
       && mkdir /opencv-3.2.0/cmake_binary && cd /opencv-3.2.0/cmake_binary \
  -    && cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local .. \
  +    && cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local \
  +             -D OPENCV_EXTRA_MODULES_PATH=/opencv_contrib-3.2.0/modules .. \
       && make install \
       && rm /3.2.0.zip \
       && rm -r /opencv-3.2.0
  
positive.code: RUN add-apt-repository ppa:jonathonf/ffmpeg-3 -y && \
      apt-get update && \
      apt-get install -y --no-install-recommends \ 
          ffmpeg=7:3.3.2-1~16.04.york1 \
          libav-tools=7:3.3.2-1~16.04.york1 \
          x264=2:0.148.2795+gitaaa9aa8-1~16.04.york0 \
          x265=2.4-1~16.04.york0 \
          libavcodec-dev=7:3.3.2-1~16.04.york1 \
          libavformat-dev=7:3.3.2-1~16.04.york1 \
          libavutil-dev=7:3.3.2-1~16.04.york1 \
          libswscale-dev=7:3.3.2-1~16.04.york1 \
          libavresample-dev=7:3.3.2-1~16.04.york1 && \
      apt-get clean && \
      rm -rf /var/lib/apt/lists/*
  
  
negative.code: 
  RUN apt-get update && \
      apt-get install -y --no-install-recommends \
          git \
          curl \
          wget \
          unzip \
          build-essential \
          gcc-5 \
          g++-5 \
          cmake \
          lcov \
          software-properties-common \
          pkg-config && \
      apt-get clean && \
      rm -rf /var/lib/apt/lists/*
  
  