C# 快速开始

using Srtc;

SrtcEngine.SetLanguage("zh-CN");                       // 可选：错误文案语言
using var engine = SrtcEngine.Init(new SrtcEngineOptions { EnableLog = 1 });
if (engine == null)
{
    return;      // 初始化失败（环境/权限问题）
}
Console.WriteLine(SrtcEngine.Version());               // 例：0.2.1-alpha.14

engine.DeviceChanged += (s, e) => Console.WriteLine($"{e.Type} {e.Action} {e.Name}");

var channel = engine.CreateChannel(token);             // token 由你的后端签发
if (channel == null)
{
    return;      // token 无效 / 解码失败
}

// 事件必须在 Join 之前接好，否则会漏掉加入瞬间的事件
channel.Joined += (s, e) =>
{
    // e.ChannelJson / MeJson / MembersJson / OptionsJson 均为原始 JSON
    Console.WriteLine("已加入 " + channel.ChannelId);
};
channel.UserJoined    += (s, e) => Console.WriteLine("用户加入 " + e.UserJson);
channel.UserStreamAdded += (s, e) => Console.WriteLine($"{e.Uid} 发布流 {e.StreamJson}");
channel.CustomMessage += (s, e) => Console.WriteLine($"[{e.Action}] {e.SenderId}: {e.Message}");

// 频道级配置（stream_model / simple / mcu_track / enable_audio_record 在 Join 阶段读取）
channel.Setting.StreamModel = (int)SrtcStreamModel.Normal;

SrtcStatusCode st = channel.Join();
if (st != SrtcStatusCode.Ok)
{
    Console.WriteLine("join 失败 " + st + " " + engine.LastErrorMessage);
    return;
}

var cam = channel.GetCameraTrack("camera");
if (cam == null) return;

SrtcStatusCode st = cam.StartCapture(new SrtcCameraCaptureOptions
{
    Width = 640, Height = -1, MaxFps = -1
});
if (st != SrtcStatusCode.Ok) return;

st = channel.Publish(cam, new SrtcVideoPublishOptions
{
    Desc = "camera_big", MaxFps = 25,
    Simucast = new[] { new SrtcVideoPublishOptions { Desc = "camera_small", Width = 320, Height = 180, MaxFps = 15, MaxBitrate = 128 } }
});

var mic = channel.GetAudioTrack("mic");
mic.StartCapture(new SrtcMicCaptureOptions());          // 默认 48kHz 单声道
channel.Publish(mic, new SrtcAudioPublishOptions { Desc = "mic", Codec = (int)SrtcStreamCodec.Opus });

var speaker = channel.GetRemoteAudioTrack("", "");
speaker.StartPlay(new SrtcAudioOutputOptions());         // 传 null 表示用默认扬声器

var remote = channel.GetRemoteVideoTrack(uid, trackId);  // uid / trackId 来自流事件
if (remote == null) return;

SrtcStatusCode st = remote.AddPlayView(new SrtcHwndView(hwnd));   // hwnd 为渲染控件的窗口句柄
if (st == SrtcStatusCode.Ok)
{
    channel.Subscribe(remote);                           // 订阅是显式的，必须自己调
}

// 取消时：先摘视图，再退订
remote.RemovePlayView(view);
channel.Unsubscribe(remote);

var screen = channel.GetScreenTrack("screen");
screen.AddScreenAudio(true);                             // 是否带系统声音

var cap = new SrtcScreenCaptureOptions { MaxFps = 10, ShowCursor = true };
cap.DeviceId = windowHwnd;                               // 窗口共享：句柄；显示器共享：填 X/Y/Width/Height
// cap.X = x; cap.Y = y; cap.Width = w; cap.Height = h;

screen.StartCapture(cap);
channel.Publish(screen, new SrtcVideoPublishOptions { Desc = "screen", Width = 1920, Height = 1080, MaxFps = 10, MaxBitrate = 2000 });

channel.Dispose();          // 若还想复用 engine，只销毁频道
engine.Dispose();           // 或释放引擎，连带所有频道