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3.Entering a Room/

3.Entering a Room

This document describes how to enter a TRTC room. Only after entering an audio/video room can a user subscribe to the audio/video streams of other users in the room or publish his or her own audio/video streams.



Call Guide

Step 1. Import the SDK

Import the SDK as instructed in Electron.

Step 2. Create an SDK instance

import TRTCCloud from 'trtc-electron-sdk';
const rtcCloud = new TRTCCloud();

Step 3. Listen for SDK events

You can use callback APIs to listen for errors, warnings, traffic statistics, network quality, as well as various audio/video events of the SDK.
function onError(errCode, errMsg) {
  // For information on the error codes, see https://intl.cloud.tencent.com/document/product/647/35124#error-codes
  console.log(errCode, errMsg);
}

function onWarning(warningCode, warningMsg) {
  // For information on the warning codes, see https://intl.cloud.tencent.com/document/product/647/35124#warning-codes
  console.log(warningCode, warningMsg);
}

rtcCloud.on('onError', onError);
rtcCloud.on('onWarning', onWarning);

Step 4. Assemble the room entry parameter TRTCParams

When calling the enterRoom API, you need to enter two key parameters: TRTCParams and TRTCAppScene.

Parameter 1: TRTCAppScene

This parameter is used to specify whether your application scenario is live streaming or real-time call.
For real-time calls, set the parameter to TRTCAppSceneVideoCall (video call) or TRTCAppSceneAudioCall (audio call). This mode is suitable for one-to-one audio/video calls or online meetings for up to 300 attendees.
For live streaming, set the parameter to TRTCAppSceneLIVE (video live streaming) or TRTCAppSceneVoiceChatRoom (audio live streaming). This mode is suitable for live streaming to up to 100,000 users. Make sure you specify the role field (valid values: anchor, audience) in TRTCParams if you use this mode.

Parameter 2: TRTCParams

TRTCParams consists of many fields; however, you usually only need to pay attention to how to set the following fields:
Parameter
Description
Remarks
Data Type
Sample Value
SDKAppID
Application ID
You can view your application ID in the TRTC console. If you don’t have an application yet, click Create application to create one.
Number
1400000123
userId
User ID
It can contain only letters, digits, underscores, and hyphens. In TRTC, a user cannot use the same user ID to enter the same room on two different devices at the same time.
String
denny or 123321
userSig
The authentication ticket needed to enter a room
userSig is calculated based on userId and SDKAppID. For the calculation method, see UserSig.
String
eJyrVareCeYrSy1SslI...
roomId
Room ID
Numeric room ID. If you want to use string-type room IDs, specify strRoomId. Do not use strRoomId and roomId at the same time.
Number
29834
strRoomId
Room ID
String-type room ID. Do not use strRoomId and roomId at the same time. "123" and 123 are considered different rooms by the TRTC backend.
String
"29834"
role
Role
There are two roles: anchor and audience. This field is required only when TRTCAppScene is set to the TRTCAppSceneLIVE or TRTCAppSceneVoiceChatRoom live streaming scenarios.
Enumeration
TRTCRoleAnchor or TRTCRoleAudience
Note
In TRTC, a user cannot use the same userId to enter the same room on two different devices at the same time; otherwise, there will be a conflict.
The value of appScene must be the same on each client. Inconsistent appScene may cause unexpected problems.

Step 5. Enter the room (enterRoom)

After preparing TRTCAppScene and TRTCParams as described in step 4, you can call the enterRoom API to enter the room.
import { TRTCParams, TRTCRoleType, TRTCAppScene } from 'trtc-electron-sdk';

const param = new TRTCParams();
param.sdkAppId = 1400000123;
param.userId = "denny";  
param.roomId = 123321;
param.userSig = "xxx";
param.role = TRTCRoleType.TRTCRoleAnchor;

// If your scenario is live streaming, set the application scenario to `TRTC_APP_SCENE_LIVE`
rtcCloud.enterRoom(param, TRTCAppScene.TRTCAppSceneLIVE);
Callbacks:
If room entry succeeds, the SDK will call back the onEnterRoom(result) event, and the value of result will be greater than 0, indicating the time in milliseconds taken to enter the room.
If room entry fails, the SDK will also call back the onEnterRoom(result) event, but the value of result will be a negative number, indicating the error code for the room entry failure.
function onEnterRoom(result) {
  // For details about `onEnterRoom`, see https://web.sdk.qcloud.com/trtc/electron/doc/en/trtc_electron_sdk/TRTCCallback.html#event:onEnterRoom
  if (result > 0) {
    console.log('Enter room succeed');
  } else {
    // For room entry error codes, see https://intl.cloud.tencent.com/document/product/647/35124
    console.log('Enter room failed');
  }

}

rtcCloud.on('onEnterRoom', onEnterRoom);