*Step 5 : Send Audio/Video stream*
==================================

MQTT & UDP payload (previous steps required)
--------------------------------------------

If you want to start a stream through the application, your device will receive the following JSON payload on MQTT and UDP.

.. code-block::
   
   {
    "action":"command",
    "timestamp":"2020-02-13 14:32:13",
    "uid":"UID",
    "modules":[
        {
            "id":"deviceID",
            "device":{
                "bearerId":"deviceID",
                "status":[
                    {
                        "capability":"start_stream",
                        "value":{
                            // Ignore this part currently
                        }
                    }
                ]
            }
        }
    ],
    "clientId":"applicationId"
   }

And when you leave the stream on the application you receive the same payload but with `"capability":"stop_stream"`.

Start the audio and/or video stream
-----------------------------------

Please refer to the samples `./sample/linux/x86_64/av`

1. Initialise the cl_av module with the `cl_av_init` function
2. Create a rtp channel to the IP and port of your choice with the `cl_av_start` function.
3. Send Audio/Video with the `cl_av_send_audio` or `cl_av_send_video` 

In order to visualise the stream. You can use the ComfortLife application if you followed the previous steps. Otherwise you can use a tool like `VLC <https://www.videolan.org/vlc/index.html>`_ (`rtp with vlc <https://wiki.videolan.org/Documentation:Streaming_HowTo/Receive_and_Save_a_Stream/>`_) to view the stream.