# Push Publishing OvenMediaEngine supports Push Publishing function that can restreaming live streams to other systems. The protocol supports widely used protocols such as [SRT](https://docs.ovenmediaengine.com/0.20.0/live-source/srt), [RTMP](https://docs.ovenmediaengine.com/0.20.0/live-source/rtmp), and MPEG-2 TS. The `StreamMap` feature has been added, and it now automatically re-streaming based on predefined conditions. You can also use the Rest API to control and monitor it. ## Configuration ### Push Publisher To use Push Publishing, you need to declare the **``** publisher in the configuration. `` is optional. It is used when automatic push is needed. ```xml ... ... false path/to/map.xml ... ``` {% hint style="info" %} The RTMP protocol only supports H264 and AAC codecs. {% endhint %} ### StreamMap `` is used for automatically pushing content based on user-defined conditions. The XML file path should be specified relative to `/conf`. `` is used to match output stream names and supports the use of wildcard characters. `` can be used to select specific tracks. Multiple variants can be specified using commas (','). The `` supports `rtmp`, `mpegts`, and `srt`. You enter the destination address in the `` and `` field, where macros can also be used. 
<?xml version="1.0" encoding="UTF-8"?>
<PushInfo>
  <Push>
    <!-- [Must] -->
    <Enable>true</Enable>
    <!-- [Must] -->
    <StreamName>stream_a_*</StreamName>
    <!-- [Optional] -->
    <VariantNames>video_h264,audio_aac</VariantNames>
    <!-- [Must] -->
    <Protocol>rtmp</Protocol>
    <!-- [Must] -->
    <Url>rtmp://1.2.3.4:1935/app/${SourceStream}</Url>
    <!-- <Url>rtmp://1.2.3.4:1935/app/${Stream}</Url> -->
    <!-- [Optional] -->
    <StreamKey></StreamKey>
    <!-- <StreamKey>some-stream-key</StreamKey> -->
  </Push>  
  <Push>
    <!-- [Must] -->
    <Enable>true</Enable>
    <!-- [Must] -->
    <StreamName>stream_b_*</StreamName>
    <!-- [Optional] -->
    <VariantNames></VariantNames>
    <!-- [Must] -->
    <Protocol>srt</Protocol>
    <!-- [Must] -->
    <Url>srt://1.2.3.4:9999?streamid=srt%3A%2F%2F1.2.3.4%3A9999%2Fapp%2Fstream</Url>
  </Push>      
  <Push>
    <!-- [Must] -->
    <Enable>false</Enable>
    <!-- [Must] -->
    <StreamName>stream_c_*</StreamName>
    <!-- [Optional] -->
    <VariantNames></VariantNames>
    <!-- [Must] -->
    <Protocol>mpegts</Protocol>
    <!-- [Must] -->
    <Url>udp://1.2.3.4:2400</Url>
  </Push>    
</PushInfo>
| Macro | Description | | --------------- | ------------------ | | ${Application} | Application name | | ${SourceStream} | Source stream name | | ${Stream} | Output stream name | ## REST API Push can be controlled using the REST API. Please refer to the documentation below for more details. {% content-ref url="rest-api/v1/virtualhost/application/push" %} [push](https://docs.ovenmediaengine.com/0.20.0/rest-api/v1/virtualhost/application/push) {% endcontent-ref %}