/CNStream

CNStream is a streaming framework for building Cambricon machine learning pipelines http://forum.cambricon.com

Primary LanguageC++Apache License 2.0Apache-2.0

Cambricon CNStream

CNStream is a streaming framework with plug-ins. It is used to connect other modules, includes basic functionalities, libraries, and essential elements.

CNStream provides the following plug-in modules:

  • source: Supports RTSP, video file, and images（H.264, H.265, and JPEG decoding.）
  • inference: MLU-based inference accelerator for detection and classification.
  • osd (On-screen display): Module for highlighting objects and text overlay.
  • encode: Encodes on CPU.
  • display: Display the video on screen.
  • tracker: Multi-object tracking.
  • rtsp_sink：Push RTSP stream to internet
  • ipc: Make pipeline across process

Cambricon Dependencies

CNStream depends on the CNCodec library and the CNRT library which are packed in Cambricon neuware package. Therefore, the lastest Cambricon neuware package is required. If you do not have one, please feel free to contact with us. Our mailbox: service@cambricon.com

Install Cambricon neuware package

Ubuntu or Debian

  dpkg -i neuware-mluxxx-x.x.x_Ubuntuxx.xx_amd64.deb
  cd /var/neuware-mluxxx-x.x.x
  dpkg -i cncodec-xxx.deb cnrt_xxx.deb

Centos

  yum -y install neuware-mluxxx-x.x.x.el7.x86_64.rpm
  cd /var/neuware-mluxxx-x.x.x
  yum -y install cncodec-xxx.rpm cnrt-xxx.rpm

After that, Cambricon dependencies that CNStream needed are installed at path '/usr/loacl/neuware'.

Please make sure you must not install cnstream_xxx.deb or cnstream-xxx.rpm.

Quick Start

This section introduces how to quickly build instructions on CNStream and how to develop your own applications based on CNStream. We strongly recommend you execute pre_required_helper.sh to prepare for the environment. If not, please follow the commands below.

Required environments

Before building instructions, you need to install the following software:

  • OpenCV2.4.9+
  • GFlags2.1.2
  • GLog0.3.4
  • Cmake2.8.7+
  • SDL22.0.4+    // If build_display=ON
  • FFmpeg2.8 3.4 4.2

Ubuntu or Debian

If you are using Ubuntu or Debian, run the following commands:

  OpenCV2.4.9+  >>>>>>>>>   sudo apt-get install libopencv-dev
  GFlags2.1.2   >>>>>>>>>   sudo apt-get install libgflags-dev
  GLog0.3.4     >>>>>>>>>   sudo apt-get install libgoogle-glog-dev
  Cmake2.8.7+   >>>>>>>>>   sudo apt-get install cmake
  SDL22.0.4+    >>>>>>>>>   sudo apt-get install libsdl2-dev

Centos

If you are using Centos, run the following commands:

  OpenCV2.4.9+  >>>>>>>>>   sudo yum install opencv-devel.x86_64
  GFlags2.1.2   >>>>>>>>>   sudo yum install gflags.x86_64
  GLog0.3.4     >>>>>>>>>   sudo yum install glog.x86_64
  Cmake2.8.7+   >>>>>>>>>   sudo yum install cmake3.x86_64
  SDL22.0.4+    >>>>>>>>>   sudo yum install SDL2_gfx-devel.x86_64

Build Instructions Using CMake

After finished prerequisites, you can build instructions with the following steps:

  1. Run the following command to save a directory for saving the output.

    mkdir build       # Create a directory to save the output.

    A Makefile is generated in the build folder.

  2. Run the following command to generate a script for building instructions.

    cd build
cmake ${CNSTREAM_DIR}  # Generate native build scripts.

    Cambricon CNStream provides a CMake script (CMakeLists.txt) to build instructions. You can download CMake for free from http://www.cmake.org/.

    ${CNSTREAM_DIR} specifies the directory where CNStream saves for.

    cmake option range default description
    build_display ON / OFF ON build display module
    build_ipc ON / OFF ON build ipc module
    build_cnencode ON / OFF ON build cnencode module
    build_encode ON / OFF ON build encode module
    build_inference ON / OFF ON build inference module
    build_osd ON / OFF ON build osd module
    build_rtsp_sink ON / OFF ON build rtsp_sink module
    build_source ON / OFF ON build source module
    build_track ON / OFF ON build track module
    build_modules_contrib ON / OFF ON build contributed modules
    build_tests ON / OFF ON build tests
    build_samples ON / OFF ON build samples
    RELEASE ON / OFF ON release / debug
    WITH_FFMPEG ON / OFF ON build with FFMPEG
    WITH_OPENCV ON / OFF ON build with OPENCV
    WITH_CHINESE ON / OFF OFF build with CHINESE
    WITH_RTSP ON / OFF ON build with RTSP

  3. If you want to build CNStream samples: a. Run the following command:

    cmake -Dbuild_samples=ON ${CNSTREAM_DIR}

    b. If wanna cross compile, please follow command to:

    cmake -DCMAKE_TOOLCHAIN_FILE=${CNSTREAM_DIR}/cmake/cross-compile.cmake ${CNSTREAM_DIR}

    Note: you need to configure toolchain by yourself in cross-compile.cmake and cross-compile gflags, glog, opencv, ffmpeg and install them into ${CNSTREAM_DIR}

    take MLU220_SOC as example:

    cmake ${CNSTREAM_DIR} -DCMAKE_TOOLCHAIN_FILE=${CNSTREAM_DIR}/cmake/cross-compile.cmake -Dbuild_tests=OFF -Dbuild_track=OFF -DWITH_TRACKER=OFF -DENABLE_KCF=OFF -DMLU=MLU220_SOC

  4. Run the following command to build instructions:

    make

  5. If wanna install CNStream's head files and libraries to somewhere, please add CMAKE_INSTALL_PREFIX to cmake command as below:

    cmake {CNSTREAM_DIR} -DCMAKE_INSTALL_PREFIX=/path/to/install
make
make install

Samples

Classification Object Detection
Classification Object Detection
Object Tracking Secondary Classification
Object Tracking Secondary Classification

Demo Overview

This demo shows how to detect objects using CNStream. It includes the following plug-in modules:

  • source: Decodes video streams with MLU, such as local video files, RTMP stream, and RTSP stream.
  • detector: Neural Network inference with MLU.
  • osd: Draws inference results on images.
  • displayer: Displays inference results on the screen.

In the run.sh script, detection_config.json is set as the configuration file. In this configuration file, resnet34_ssd.cambricon is the offline model used for inference, which means, the data will be fed to an SSD model after decoding. And the results will be shown on the screen.

In addition, see the comments in cnstream/samples/demo/run.sh for details.

Also there are several demos as located under classification, detection, track, secondary, rtsp etc.

Run samples

To run the CNStream sample:

  1. Follow the steps above to build instructions.

  2. Run the demo using the list below:

    cd ${CNSTREAM_DIR}/samples/demo

./run.sh

Best Practices

How to create an application based on CNStream?

You should find a sample from samples/example/example.cpp that helps developers easily understand how to develop an application based on CNStream pipeline.

How to change the input video file?

Modify the files.list_video file, which is under the cnstream/samples/demo directory, to replace the video path. Each line represents one stream. It is recommended to use an absolute path or use a relative path relative to the executor path.

Documentation

CNStream Read-the-Docs or Cambricon Forum Docs

Check out the Examples page for tutorials on how to use CNStream. Concepts page for basic definitions

Community forum

Discuss - General community discussion around CNStream