How to record and stream live in Vue
Screen recording and live streaming are commonly used functions in modern web applications, such as online education, video conferencing and game live streaming. As a popular JavaScript framework, Vue provides some tools and libraries that can easily implement screen recording and live streaming functions. This article will introduce how to perform screen recording and live streaming in Vue.
Screen recording
Screen recording refers to the process of recording the contents of a computer screen into video. There are two ways to do screen recording in Vue:
1. Using the WebRTC API
WebRTC is a Web API for real-time communication, which provides functions such as audio and video transmission, network negotiation and security. Screen recording can be easily implemented using WebRTC in Vue. Here is a sample code for screen recording using WebRTC:
<template>
<div>
<button @click="startRecording">Start recording</button>
<button @click="stopRecording">Stop recording</button>
<video ref="video" controls></video>
</div>
</template>
<script>
export default {
data() {
return {
mediaRecorder: null,
recordedChunks: []
}
},
methods: {
async startRecording() {
const stream = await ();
= new MediaRecorder(stream, { mimeType: 'video/webm; codecs=vp9' });
('dataavailable', event => {
();
});
();
},
stopRecording() {
();
const blob = new Blob(, { type: 'video/webm' });
const url = (blob);
this.$ = url;
}
}
}
</script>
In the above code, we used the getDisplayMedia() method in the WebRTC API to get the screen stream and recorded the screen stream as a video using the MediaRecorder API. When the user clicks the "Start Recording" button, we create a MediaRecorder object and add a dataavailable event listener to it. When the data is available, we save the data to the recordedChunks array. When the user clicks the "Stop Recording" button, we will stop recording, convert the recorded data into a Blob object, and assign it to the video element as a video source URL.
2. Use RecordRTC library
RecordRTC is a JavaScript library for recording media streams. It supports screen recording, audio and video recording, and audio and video mixing. Screen recording can be easily implemented using RecordRTC in Vue. Here is a sample code for screen recording using RecordRTC:
<template>
<div>
<button @click="startRecording">Start recording</button>
<button @click="stopRecording">Stop recording</button>
<video ref="video" controls></video>
</div>
</template>
<script>
import { RecordRTC } from 'recordrtc';
export default {
data() {
return {
recorder: null,
videoStream: null,
recordedBlob: null
}
},
methods: {
async startRecording() {
= await ();
= new RecordRTC(, {
type: 'video',
mimeType: 'video/webm; codecs=vp9'
});
();
},
async stopRecording() {
await ();
= ();
const url = ();
this.$ = url;
().forEach(track => ());
}
}
}
</script>
In the above code, we use the RecordRTC object from the RecordRTC library for screen recording. When the user clicks the "Start Recording" button, we get the screen stream and create a RecordRTC object. When the user clicks the "Stop Recording" button, we will stop recording, get the recorded data, and assign it to the video element as the video source URL. After stopping recording, we also need to close all tracks in the screen stream.
Live streaming
Live streaming is the process of pushing audio and video streams to the server and forwarding them to the audience in real time. There are two ways to do live streaming in Vue:
1. Using the WebRTC API
Similar to screen recording, the WebRTC API can also be used to implement live streaming. Here is a sample code for live streaming using WebRTC:
<template>
<div>
<video ref="localVideo" autoplay muted></video>
<video ref="remoteVideo" autoplay></video>
<button @click="startStreaming">Start pushing</button>
<button @click="stopStreaming">Stop pushing</button>
</div>
</template>
<script>
export default {
data() {
return {
localStream: null,
remoteStream: null,
peerConnection: null,
mediaConstraints: {
audio: true,
video: true
},
serverConfig: {
iceServers: [
{ urls: 'stun::19302' }
]
}
}
},
methods: {
async startStreaming() {
= await ();
this.$ = ;
= new RTCPeerConnection();
();
('addstream', event => {
= ;
this.$ = ;
});
},
stopStreaming() {
();
().forEach(track => ());
}
}
}
</script>
In the above code, we used the getUserMedia() method in the WebRTC API to obtain the local media stream, and used the RTCPeerConnection API to create a point-to-point connection to realize the live streaming function. When the user clicks the "Start Push Streaming" button, we will get the local media stream and assign it to the localVideo element as the video source URL. We will also create an RTCPeerConnection object and add the local media stream to the connection. When the remote media stream is available, we assign it to the remoteVideo element as the video source URL. When the user clicks the "Stop push stream" button, we close the point-to-point connection and stop all tracks in the local media stream.
2. Use the Vue-RTMP library
Vue-RTMP is a Vue plug-in for RTMP protocol streaming. It implements live streaming function based on the Heli library. Using Vue-RTMP can easily implement live streaming function in Vue. Here is a sample code for live streaming using Vue-RTMP:
<template>
<div>
<video ref="video" autoplay></video>
<button @click="startStreaming">Start pushing</button>
<button @click="stopStreaming">Stop pushing</button>
</div>
</template>
<script>
import VueRtmp from 'vue-rtmp';
export default {
data() {
return {
rtmpConfig: {
url: 'rtmp://localhost/live/stream',
options: {
swf: '/static/',
flash: true
}
},
rtmpPlayer: null
}
},
methods: {
startStreaming() {
= new VueRtmp();
(this.$);
();
();
},
stopStreaming() {
();
}
}
}
</script>
In the above code, we use the VueRtmp object in the Vue-RTMP library for live streaming. When the user clicks the "Start push stream" button, we create a VueRtmp object and bind it to the video element. We will also call the load() method and the play() method to start pushing the stream. When the user clicks the "Stop Push Stream" button, we will call the stop() method to stop pushing.
Summarize
This article introduces two methods of screen recording and live streaming in Vue. Screen recording and live streaming can be easily implemented using the WebRTC API, while RecordRTC library can provide more recording capabilities. Live streaming function can be easily implemented using the Vue-RTMP library.
It should be noted that the WebRTC API and RecordRTC library may have different compatibility issues in different browsers. When using these APIs and libraries, adequate testing and compatibility checks are required to ensure that the application can run properly on a variety of browsers and operating systems.
In addition, the screen recording and live streaming function requires the use of devices such as cameras and microphones, and requires user authorization to be used. When using these functions, the principle of privacy protection should be followed to ensure that the user's privacy is not violated.
When implementing screen recording and live streaming functions, many details and technical details need to be considered. This article provides some basic example code and methods that can be used as a reference for beginners. However, for more complex applications and scenarios, more in-depth learning and research are required.
Finally, it is important to emphasize that screen recording and live streaming capabilities can add a lot of value and appeal to modern web applications. In an increasingly competitive market, mastering these technologies and tools can enable developers to be more competitive and create better user experiences.
The above is a detailed explanation of how to implement screen recording and live streaming functions in vue. For more information about vue screen recording and live streaming, please pay attention to my other related articles!