Human Pose Estimation Sample (gst-launch command line)

This sample demonstrates human pose estimation pipeline constructed via gst-launch-1.0 command-line utility.

How It Works

The sample utilizes GStreamer command-line tool gst-launch-1.0 which can build and run GStreamer pipeline described in a string format. The string contains a list of GStreamer elements separated by exclamation mark !, each element may have properties specified in the format property=value.

This sample builds GStreamer pipeline of the following elements

  • filesrc or urisourcebin or v4l2src for input from file/URL/web-camera
  • decodebin for video decoding
  • videoconvert for converting video frame into different color formats
  • gvaclassify uses for full-frame inference and post-processing of OpenPose's output
  • gvawatermark for points and theirs connections visualization
  • fpsdisplaysink for rendering output video into screen

    NOTE: sync=false property in fpsdisplaysink element disables real-time synchronization so pipeline runs as fast as possible

    Models

The sample uses by default the following pre-trained models from OpenVINO™ Toolkit Open Model Zoo

  • human-pose-estimation-0001 generates poses keypoints

NOTE: Before running samples (including this one), run script download_models.sh once (the script located in samples top folder) to download all models required for this and other samples.

The sample contains model_proc subfolder with .json files for each model with description of model input/output formats and post-processing rules for classification models.

Running

./human_pose_estimation.sh [INPUT_VIDEO] [DEVICE] [SINK_ELEMENT]

The sample takes three command-line optional parameters:

  1. [INPUT_VIDEO] to specify input video file.
    The input could be
  • local video file
  • web camera device (ex. /dev/video0)
  • RTSP camera (URL starting with rtsp://) or other streaming source (ex URL starting with http://)
    If parameter is not specified, the sample by default streams video example from HTTPS link (utilizing urisourcebin element) so requires internet conection.
  1. [DEVICE] to specify device for detection and classification.
    Please refer to OpenVINO™ toolkit documentation for supported devices.
    https://docs.openvinotoolkit.org/latest/openvino_docs_IE_DG_supported_plugins_Supported_Devices.html
    You can find what devices are supported on your system by running following OpenVINO™ toolkit sample:
    https://docs.openvinotoolkit.org/latest/openvino_inference_engine_ie_bridges_python_sample_hello_query_device_README.html
  2. [SINK_ELEMENT] to choose between render mode and fps throughput mode:
    • display - render (default)
    • fps - FPS only

Sample Output

The sample

  • prints gst-launch-1.0 full command line into console
  • starts the command and either visualizes video with people's skeleton or prints out fps if you set SINK_ELEMENT = fps

See also