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Third party dependencies installation guide（python sample）

Precondition

Install CANN package according to official documents

Installation note

Some python samples in the samples repository use third-party dependencies such as opencv and ffmpeg for image processing, so you need to install third-party dependencies and configure the environment according to the instructions in this article before running. Since the python development process does not depend on compilation, third-party dependent installations are all operated in the operation environment.

Installation preparation

Run the following codes in operation environment for installation preparation.

# Run the following codes as installation user, open .bashrc
vi ~/.bashrc  
# Add the following contents at the end of the file
export CPU_ARCH=`arch`
export THIRDPART_PATH=${HOME}/Ascend/thirdpart/${CPU_ARCH}  #link to third-party library when compling
export PYTHONPATH=${THIRDPART_PATH}:$PYTHONPATH #set pythonpath as fixed directory
export INSTALL_DIR=${HOME}/Ascend #set installation path for CANN
# Execute the following to save and exit
:wq!  
# Execute the following to take effect 
source ~/.bashrc 
# Create third-party dependecy file
mkdir -p ${THIRDPART_PATH}
# Copy common file to third-party dependency file
cd ${HOME}     
git clone https://github.com/Ascend/samples.git
cp -r ${HOME}/samples/common ${THIRDPART_PATH}

In 200DK scenario, run the following to copy media_mini header file and media package

mkdir -p ${INSTALL_DIR}/driver
cp /usr/lib64/libmedia_mini.so ${INSTALL_DIR}/driver
cp /usr/local/Ascend/include/peripheral_api.h  ${INSTALL_DIR}/driver

Installation steps

Install opencv

Run the following on operation environment to install dependencies and python-opencv

# Note：using pip3.7.5 to install opencv will result in failure in video processing function，so we use apt. Apt can only be installed in python3.6, so python3.6is used in third-party dependencies   
# Install pip3
sudo apt-get install python3-pip
# Install python library
python3.6 -m pip install --upgrade pip --user -i https://mirrors.huaweicloud.com/repository/pypi/simple
python3.6 -m pip install Cython numpy tornado==5.1.0 protobuf --user -i https://mirrors.huaweicloud.com/repository/pypi/simple
# Install python3-opencv
sudo apt-get install python3-opencv

Install python-acllite

1. Install python-acllite dependencies on operation environment

   # Install ffmpeg
   sudo apt-get install -y libavformat-dev libavcodec-dev libavdevice-dev libavutil-dev libswscale-dev libavresample-dev
   # Install other dependencies
   pip3.6 install --upgrade pip
   pip3.6 install Cython
   sudo apt-get install pkg-config libxcb-shm0-dev libxcb-xfixes0-dev
   # Install pyav
   python3.6 -m pip install av==6.2.0
   # Install pillow dependencies
   sudo apt-get install libtiff5-dev libjpeg8-dev zlib1g-dev libfreetype6-dev liblcms2-dev libwebp-dev tcl8.6-dev tk8.6-dev python-tk
   # Install numpy and PIL
   pip3.6 install numpy
   pip3.6 install Pillow
   

2. install python-acllite
   python acllite library is delivered as source code, copy acllite directory to third party library directory on operation environment during installation

   # copy acllite directory to third party library directory on operation environment during installation, in future changes, this acllite file need to be changed
   cp -r ${HOME}/samples/python/common/acllite ${THIRDPART_PATH}
   

3. C code library compilation（selectable. If acllite's peripheral deivce codes change in 200DK scenario, run the following, otherwise skip！）
   This library contains camera API on 200DK, the API is encapsulated with python on C code(lib/src/directory) basis. When using this library on Atlas 200DK, recompile C code if original code change.
   1. compile libmedia_mini.so dependencies，please finish instalation preparation.
   2. Enter lib/src directory of acllite，run the following to start compile so

      cd ${HOME}/samples/python/common/acllite/lib/src
      make 
      # The generated libatalsutil.so is in ../atlas200dk/  
      

   3. Execute install python-acllite again to ensure you are using the updated code.