This document describes how to implement a browser-based video call solution.

• Part 1 describes how to activate the service and run the demo.
• Part 2 describes how to build your own video call feature using the TRTCCalling component.

Environment Requirements

Currently, the desktop version of Chrome offers better support for the features of the TRTC SDK for desktop browsers; therefore, Chrome is recommended for the demo.

TRTCCalling uses the following ports and domain name for data transfer, which should be added to the allowlist of the firewall. After configuration, please use the official demo to check whether the configuration has taken effect.

• TCP port: 8687
• UDP ports: 8000, 8080, 8800, 843, 443, 16285
• Domain name: qcloud.rtc.qq.com

The service supports the following platforms:

Running the Demo

Step 1. Create an application

1. Sign up for a Tencent Cloud account and verify your identity.
2. Log in to the TRTC console and select Development Assistance > Demo Quick Run.
3. Enter an application name such as TestTRTC and click Create.

Step 2. Download the SDK and demo source code

1. Download the SDK and demo source code.
2. Click Next.
   

Step 3. Configure demo project files

1. In the Modify Configuration step, select the development platform in line with the source package downloaded.
2. Find and open the Web/js/debug/GenerateTestUserSig.js file.
3. Set parameters in GenerateTestUserSig.js as follows:
   • SDKAPPID: `0` by default. Set it to the actual `SDKAppID`.
   • SECRETKEY: left empty by default. Set it to the actual key.
   
4. Click Next to complete the creation.
5. After compilation, click Return to Overview Page.

Note：

• The method for generating UserSig described in this document involves configuring SECRETKEY in client code. In this method, SECRETKEY may be easily decompiled and reversed, and if your key is leaked, attackers can steal your Tencent Cloud traffic. Therefore, this method is only suitable for the local execution and debugging of the demo.
• The correct UserSig distribution method is to integrate the calculation code of UserSig into your server and provide an application-oriented API. When UserSig is needed, your application can send a request to the business server for a dynamic UserSig. For more information, see How do I calculate UserSig on the server?.

Step 4. Run the demo

1. In the demo directory, run the following commands in turn:

   npm install
   npm run serve
   

Building Your Own Video Call Solution

Step 1. Import the TRTCCalling component

Note：

• Since version 0.6.0, you need to manually install dependencies trtc-js-sdk, tim-js-sdk, and tsignaling.
• To reduce the size of trtc-calling-js.js and prevent version conflict between trtc-calling-js.js and the already-in-use trtc-js-sdk, tim-js-sdk or tsignaling, the latter three are packaged as external dependencies, which you need to install manually before use.

// Import via npm
  npm install trtc-js-sdk --save

  npm install tim-js-sdk --save

  npm install tsignaling --save

  npm install trtc-calling-js --save

// If you import `trtc-calling-js` via a script, you need to manually import the following resources in the specified order.

  <script src="./trtc.js"></script>
  <script src="./tim-js.js"></script>
  <script src="./tsignaling.js"></script>
  <script src="./trtc-calling-js.js"></script>

Step 2. Create a TRTCCalling object

Create a TRTCCalling object and set the SDKAppID parameter to your SDKAppID.

import TRTCCalling from 'trtc-calling-js';

let options = {
  SDKAppID: 0 // Replace 0 with your `SDKAppID` when connecting
};
const trtcCalling = new TRTCCalling(options);

Step 3. Log in

Call the login function to log in, with userID set to your user ID and userSig set to your signature. For how to calculate userSig, see FAQs > UserSig.

trtcCalling.login({
userID,
userSig,
});

Step 4. Make a one-to-one call

Caller: making a call

trtcCalling.call({
 userID,  // User ID
 type: 2, // Call type. `0`: unknown; `1`: audio call; `2`: video call
 timeout  // Timeout threshold, in seconds
});

Callee: answering a call

// Answer
trtcCalling.accept({
 inviteID, // Invitation ID, which identifies an invitation
 roomID,   // Room ID
 callType  // `0`: unknown; `1`: audio call; `2`: video call
});
// Reject
trtcCalling.reject({ 
 inviteID, // Invitation ID, which identifies an invitation
 isBusy // Whether the line is busy. `0`: unknown; `1`: audio call; `2`: video call
 })

Turning the local camera on

trtcCalling.openCamera()

Showing a remote video

trtcCalling.startRemoteView({
 userID, // Remote user ID
 videoViewDomID // The user’s data will be rendered in this DOM node
})

Showing the preview of the local video

trtcCalling.startLocalView({
 userID, // Local user ID
 videoViewDomID // The user’s data will be rendered in this DOM node
})

Hanging up

trtcCalling.hangup()