How to implement rtmp streaming in uniapp

Uniapp is a cross-platform development framework suitable for developing applications for multiple platforms, including mobile applications and web applications. RTMP is a streaming media transport protocol used for real-time data exchange. This article will introduce how to use the Uniapp framework to implement RTMP streaming to achieve real-time data transmission.

1. Introduction to Uniapp

Uniapp is a cross-platform development framework based on the Vue.js framework. You can use the syntax and life cycle of Vue.js to write a code and compile it at the same time. It can be integrated into multiple platform applications such as iOS, Android, H5, mini programs, quick applications, etc., and supports hot reloading, resulting in high development efficiency. Uniapp supports the use of plug-ins, is highly scalable, and can be easily integrated with other frameworks and libraries. Uniapp has complete documentation and a rich component library and examples, allowing you to quickly build applications.

2. Introduction to RTMP protocol

RTMP (Real Time Messaging Protocol) is a real-time data transmission protocol developed by Adobe and used for streaming audio, video and data on the Internet. The RTMP protocol is a scalable multimedia transmission protocol that can achieve low latency, high bandwidth, and high-quality streaming media transmission.

RTMP protocol mainly consists of three parts: connection protocol, command protocol and media protocol. The connection protocol is mainly responsible for establishing a connection and maintaining the stability of the connection. The command protocol is mainly used for sending commands to control the status of streaming media. The media protocol is mainly responsible for transmitting audio, video and data streams.

3. Uniapp implements RTMP streaming

Uniapp provides a plug-in called uni-rtmp, which can be used to implement RTMP streaming and playback functions in Uniapp applications. The uni-rtmp plug-in is developed based on Lavfer's open source RTMP client library librtmp and can support streaming media data in multiple encoding formats and container formats.

The following are the steps to implement RTMP streaming:

1. Install the uni-rtmp plug-in

In the Uniapp project, open the command line window and enter the following Command:

npm install uni-rtmp --save

This will download and install the uni-rtmp plugin.

2. Create a push function

In the Uniapp project, create a push page:

<template>
  <view>
    <live-pusher class="pusher" ref="pusher" url="{{pushUrl}}" bindstatechange="pusherStateChange" binderror="pusherError"></live-pusher>
    <input class="input" placeholder="输入推流URL" value="{{pushUrl}}" bindinput="inputUrl" />
    <button class="btn-push" type="primary" size="default" bindtap="startPush">开始推流</button>
  </view>
</template>
<script>
  import { RTMP } from 'uni-rtmp'
  export default {
    data() {
      return {
        pushUrl: '',
      }
    },
    methods: {
      inputUrl(e) {
        this.pushUrl = e.detail.value
        uni.setStorageSync('pushUrl', this.pushUrl)
      },
      startPush() {
        this.$refs.pusher.start()
      },
      pusherStateChange(e) {
        console.log('statechange', e)
      },
      pusherError(e) {
        console.log('error', e)
      },
    },
  }
</script>
<style>
  .pusher {
    width: 100vw;
    height: 800px;
  }
  .input {
    width: 100%;
    height: 50px;
    margin-top: 20px;
    text-align: center;
  }
  .btn-push {
    margin-top: 20px;
  }
</style>

In this page, a live- The pusher component is used to implement RTMP streaming. In data, the pushUrl variable is defined to store the push URL entered by the user. In methods, the inputUrl method is defined to obtain the push URL entered by the user, the startPush method is used to start the push, the pusherStateChange method is used to handle push status change events, and the pusherError method is used to handle push error events.

When the page is initialized, call uni.getStorageSync('pushUrl') to obtain the URL address of the last push stream and pass it into pushUrl. In this way, the stream can be pushed based on the last push address to improve the user experience.

3. Test the push function

After completing the push page code, you can test the push function. Open the Uniapp application, enter the push URL address, and click the Start Push button to start RTMP push. RTMP players such as VLC can be used on other devices to play the pushed video content.

4. Summary

By using the uni-rtmp plug-in, you can easily implement RTMP streaming and playback functions in the Uniapp application. The Uniapp framework provides a variety of support for cross-platform application development, allowing developers to save a lot of time and energy. In the future, the RTMP protocol will become one of the important means of streaming media transmission, and Uniapp can be a good choice for RTMP transmission.

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