How to implement one-to-one video calls in uniapp

One-to-one video calling is one of the common features in modern social networking applications. Today, as the development of mobile applications becomes increasingly mature, many applications have begun to add this function to provide users with a good communication experience.

This article will introduce how to use the uniapp framework to implement one-to-one video calling.

1. Preparation

Before using the uniapp framework to implement the video call function, we need to clarify some prerequisites. First, we need to use uniapp for application development, and the application needs to support access to the camera and microphone. At the same time, we need to use some third-party plug-ins to implement the video call function, such as WebRTC and webrtc_adaptor plug-ins.

Secondly, we need to adapt to video calls on different platforms. For example, the video call adaptation methods for iOS and Android platforms may be different. Thirdly, we need to use some tools or libraries to manage the call, such as using Socket.io to manage the signaling transmission of the call.

2. The basic process of creating a one-to-one video call

When implementing a one-to-one video call, we need to follow the following basic process:

1. User sends Connection request

When a user needs to make a video call with another user, he or she needs to first send a connection request to the user to request the other party's permission to establish a video call connection with themselves.

2. Establish a video call connection

After the call request is allowed by the other party, we need to establish a video call connection. Here you need to use the WebRTC plug-in and webrtc_adaptor plug-in to capture and process the video stream, and establish a peer-to-peer connection and media negotiation connection. The process of establishing this connection will involve some complex technical details, which require a more in-depth understanding.

3. Start a video call

When the video call connection is successfully established, we can start the video call. In this process, it is necessary to use a camera and microphone to capture audio and video data, encode and decode it, and finally transmit the audio and video data to the opposite end, and then present it on the opposite end's screen through decoding.

4. End video call

When the call is completed, the video call connection needs to be closed to release resources.

3. Implementing one-to-one video calls in uniapp

Implementing the one-to-one video call function in the uniapp framework is mainly divided into the following four steps:

1. Introducing WebRTC and webrtc_adaptor plug-ins

When using uniapp for application development, we can use the plug-ins provided by the uni-app-plus platform, such as uni-app-webrtc and uni-app-webrtc-adaptor , to provide us with support for WebRTC and webrtc_adaptor plug-ins.

2. Establishing a connection

When calling the WebRTC plug-in, we can use the RTCPeerConnection object to establish a peer-to-peer connection. During the process of establishing a connection, we need to perform media negotiation on SDP. Through media negotiation, both parties can negotiate consistent parameters to establish a video call connection.

3. Start a video call

When the two parties are connected, you can make a video call. After the video call starts, you need to use the getUserMedia interface to access the camera and microphone to obtain audio and video data. Then, the audio and video data are transmitted through the RTCPeerConnection object.

4. Ending the video call

When the video call ends, you need to call the close() method of the RTCPeerConnection object to close the video call connection and release related resources.

4. Summary

Through the above steps, we can implement the one-to-one video call function in the uniapp framework. However, it should be noted that the video calling function is a complex technology that involves many technical details. When using the uniapp framework to implement the video call function, we need to understand each technology in detail to ensure call quality and stability.

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