集成 RTC SDK 后，你可以使用其中接口快速构建基础应用，实现基本实时音视频通话；你也能通过阅读代码，了解音视频通话的最佳实践。 如果你想了解完整的项目实现，参看 Demo 工程文件。

前提条件

• Unity Editor 2017+

  以下示例基于 Unity 2017 版本。不同的 Unity 版本上，操作方式可能有细微差别。如果你使用的 Unity 版本和示例中不一致，并发生了问题，请联系技术支持。

• Android Studio 3.5+

• XCode 14.1 +

• 获取 Appid

• 获取 RTC SDK 文件

步骤 1：集成 SDK

下载 SDK 离线包，然后导入到 Unity 工程中，如下图所示：

步骤 2：系统配置

Windows 平台

进入 PlayerSetting -> Other Settings。

1. 设置 Scripting Runtime Version 为 Experimental (.Net 4.6 Equivalent)。
2. 选择 IL2CPP 打包方式。

Android 平台

配置 Gradle

在 PlayerSetting -> Publishing Settings 下，勾选 CustomGradleTemplate, 如果没有 CustomGradleTemplate， 则勾选 CustomLauncherGradle Template。

之后会在 Assets -> Plugins -> Android 目录下生成 Template.gradle 文件，然后在里面添加代码：

implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:support-v4:28.0.0'
implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.2.61'

packagingOptions
{
    pickFirst "lib/*/libc++_shared.so"

    pickFirst "lib/*/libbmf_hydra.so"
    pickFirst "lib/*/libbmf_mods.so"
    pickFirst "lib/*/libbytenn.so"
    pickFirst "lib/*/libbytertc_ffmpeg_audio_extension.so"
    pickFirst "lib/*/libbytertc_nico_extension.so"
    pickFirst "lib/*/libbytertc_videodenoise_extension.so"
    pickFirst "lib/*/libbytertc_videosharpen_extension.so"
    pickFirst "lib/*/libbytertc_videosr_extension.so"
    pickFirst "lib/*/libh265enc.so"

}

iOS 平台

配置 XCodePostProcess

在 Assets 文件下新建 Editor 目录，在 Editor 目录下新建 XCodePostProcess.cs 文件。

在 XCodePostProcess.cs 里面添加生成 XCode 工程的配置代码：

using UnityEditor;
using UnityEditor.Callbacks;
using UnityEditor.iOS.Xcode;
using UnityEditor.iOS.Xcode.Extensions;
using System.IO;

public static class XCodePostProcess
{
    private static void AddEmbedFramework(PBXProject project, string targetGuid, string frameworkName) 
    {
#if !UNITY_2019_3_OR_NEWER
        const string defaultLocationInProj = "Frameworks/RTCVideo/Plugins/iOS";
        string framework = Path.Combine(defaultLocationInProj, frameworkName);
        string fileGuid = project.AddFile(framework, "Frameworks/" + framework, PBXSourceTree.Sdk);
        PBXProjectExtensions.AddFileToEmbedFrameworks(project, targetGuid, fileGuid);
#endif
    }

    [PostProcessBuild(999)]
    public static void OnPostProcessBuild(BuildTarget buildTarget, string path)
    {
        if(buildTarget == BuildTarget.iOS)
        {
            string projectPath = path + "/Unity-iPhone.xcodeproj/project.pbxproj";

            PBXProject pbxProject = new PBXProject();
            pbxProject.ReadFromFile(projectPath);
#if !UNITY_2019_3_OR_NEWER
            string mainTarget = PBXProject.GetUnityTargetName();
#else
            string mainTarget = pbxProject.GetUnityMainTargetGuid();
#endif
            string targetGuid = pbxProject.TargetGuidByName(mainTarget);
            pbxProject.SetBuildProperty(targetGuid, "ENABLE_BITCODE", "NO");
            pbxProject.SetBuildProperty(targetGuid, "CODE_SIGN_STYLE", "Manual");
            pbxProject.SetBuildProperty(targetGuid, "PRODUCT_NAME", "VideoSDKDemo");
        
            AddEmbedFramework(pbxProject, targetGuid, "VolcEngineRTC.framework");
            AddEmbedFramework(pbxProject, targetGuid, "VolcEngineRTCScreenCapturer.framework");
            AddEmbedFramework(pbxProject, targetGuid, "ByteRTCCWrapper.framework");
            pbxProject.SetBuildProperty(targetGuid, "LD_RUNPATH_SEARCH_PATHS", "$(inherited) @executable_path/Frameworks");
            pbxProject.WriteToFile (projectPath);

            // 修改plist
            string plistPath = path + "/Info.plist";
            PlistDocument plist = new PlistDocument();
            plist.ReadFromString(File.ReadAllText(plistPath));
            PlistElementDict rootDict = plist.root;
            rootDict.SetString("NSMicrophoneUsageDescription", "App需要您的同意,才能访问麦克风");
            rootDict.SetString("NSCameraUsageDescription", "App需要您的同意,才能访问相机");
            rootDict.SetString("CFBundleIdentifier", "${PRODUCT_BUNDLE_IDENTIFIER}");
            PlistElementArray backgroundModesArray = rootDict.CreateArray("UIBackgroundModes");
            backgroundModesArray.AddString("audio");
            plist.WriteToFile(plistPath);
        }
    }
}

步骤 3：实现音视频通话

1. 创建引擎实例 CreateRTCVideo

public int CreateRTCVideo(RTCVideoEngineParams initParams)
 
  public struct RTCVideoEngineParams {
        /** {zh}
         * @brief 应用 ID。
         */
        public string AppID;
        /** {zh}
         * @brief 初始化参数。
         */
        public Dictionary<string, object> Params;
    };

2. 设置视频编码参数

public int SetVideoEncoderConfig(VideoEncoderConfig maxSolution)

3. 设置本地视频渲染视图 SetLocalVideoSink

void SetLocalVideoSink(StreamIndex index, VideoSinkPixelFormat requiredFormat)

4. 开始视频采集 StartVideoCapture

public void StartVideoCapture()

5. 开始音频采集 StartAudioCapture

public void StartAudioCapture()

6. 创建房间 CreateRTCRoom

IRTCVideoRoom  CreateRTCRoom(string  roomID)

7. 加入房间 JoinRoom

int JoinRoom(string  token, UserInfo info, MultiRoomConfig roomConfig)

8. 处理房间状态改变回调 OnRoomStateChangedEventHandler

void OnRoomStateChangedEventHandler(string  roomID,  string  userID,  int  state,  string  ExtraInfo)

9. 处理用户加入房间回调 OnUserJoinedEventHandler

void OnUserJoinedEventHandler(string  roomID, UserInfo userInfo,  int  elapsed)

10. 处理远端视频首帧解码的回调 OnFirstRemoteVideoFrameDecodedEventHandler

void OnFirstRemoteVideoFrameDecodedEventHandler(RemoteStreamKey key, VideoFrameInfo info)

11. 设置远端视图 SetRemoteVideoSink

void SetRemoteVideoSink(RemoteStreamKey streamKey, VideoSinkPixelFormat requiredFormat)

12. 处理用户离开房间回调 OnUserLeaveEventHandler

void OnUserLeaveEventHandler(string  roomID,  string  userID, UserOfflineReason reason)

13. 离开房间 LeaveRoom

void LeaveRoom()

14. 销毁引擎实例 DestroyRTCVideo

void DestroyRTCVideo()