anchor.diff: -FROM ubuntu:trusty
  +FROM ampervue/python34
   
   # https://github.com/ampervue/docker-python34-opencv3
   
  
positive.code:     && 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 \
      && curl -Os http://www.tortall.net/projects/yasm/releases/yasm-${YASM_VERSION}.tar.gz \
      && tar xzvf yasm-${YASM_VERSION}.tar.gz
  
  # Build YASM
  # =================================
  WORKDIR /usr/local/src/yasm-${YASM_VERSION}
  RUN ./configure \
      && make -j ${NUM_CORES} \
      && make install
  # =================================
  
  
  # Build L-SMASH
  # =================================
  
negative.code: #
  #####################################################################
  
  ENV NUM_CORES 4
  
  
  WORKDIR /usr/local/src
  
  