DeepStream Reference Application - deepstream-nmos app
=======================================================

Application Architecture
---------------------------

The image below shows the architecture of the NVIDIA\ :sup:`®` DeepStream NMOS reference application.

  .. image:: /content/DS_reference_nmos_app.png
        :align: center
        :alt: DeepStream NMOS Reference Application Architecture

This application demonstrates how to create any DeepStream app as an `NMOS <https://specs.amwa.tv/nmos/>`_ Node.

It uses a library (:doc:`NvDsNmos <DS_library_nvdsnmos>`) which provides the APIs to create, destroy and internally manage the NMOS Node.
The NMOS Node can automatically discover and register with an NMOS Registry on the network using the `AMWA IS-04 <https://specs.amwa.tv/is-04/>`_ Registration API.

It also shows how to create various Video and Audio pipelines, run them simultaneously and reconfigure them based on NMOS events such as `AMWA IS-05 <https://specs.amwa.tv/is-05/>`_ Connection API requests from an NMOS Controller.


This application has three modes of operations:

**As NMOS Receiver (Default)**

  In this mode, application provides NMOS Receivers that can be used to configure UDP sources to receive SMPTE ST 2110-20/-30 streams. Received (Video / Audio) streams are rendered to local Video / Audio sinks after some processing (Object detection and Bounding box overlay in case of Video).

**As NMOS Sender**

  In this mode, application provides NMOS Senders that can be used to configure UDP sinks to transmit SMPTE ST 2110-20/-30 streams. Transmitted streams are created from ``videotestsrc`` and ``audiotestsrc``.

**As Both NMOS Receiver and Sender**

   In this mode, application provides NMOS Receivers to configure UDP sources and after processing the data transmits streams from UDP sinks which are configured by NMOS Senders.


Using Easy-NMOS for NMOS Registry and Controller
------------------------------------------------

This application requires AMWA IS-05 Connection API requests for its operation. These events are generated by an NMOS Controller. Easy-NMOS is a simple and easy way to set up an NMOS Controller and Registry. Follow the instructions below to set up the NMOS Registry and run the NMOS Controller.

.. Note::
    These instructions expect that docker and docker compose are already installed. If not then refer steps provided here - https://docs.docker.com/engine/install/ and https://docs.docker.com/compose/install/.

Or follow the quick instructions here - https://github.com/rhastie/easy-nmos/blob/master/install_docker.md

1) Clone the git repository as follows: ::

     git clone https://github.com/rhastie/easy-nmos.git

2) Modify the ``docker-compose.yml`` to replace the values of "ipv4_address" fields of each container accordingly.

3) Start the docker containers as follows: ::

     docker-compose up

Once setup is complete, the NMOS Controller should be running on following address. ::

  http://nmos-registry.local/admin

Refer to https://github.com/rhastie/easy-nmos for detailed instructions for setup.

Refer to https://www.amwa.tv/easy-nmos-videos for a tutorial on Easy-NMOS.

Refer to https://specs.amwa.tv/nmos/ for details about the NMOS specifications.