# SimulcastStreamConfig (/zh-CN/api-reference/rtc/unreal-cpp/class-simulcaststreamconfig)

> For AI agents: see the complete documentation index at [llms.txt](/llms.txt).

<a id="class_simulcaststreamconfig__prototype"></a>

```cpp
struct SimulcastStreamConfig {

  VideoDimensions dimensions;

  int kBitrate;

  int framerate;
  SimulcastStreamConfig() : dimensions(160, 120), kBitrate(65), framerate(5) {}
  bool operator==(const SimulcastStreamConfig& rhs) const {
    return dimensions == rhs.dimensions && kBitrate == rhs.kBitrate && framerate == rhs.framerate;
  }
};
```

<a id="class_simulcaststreamconfig__parameters"></a>

## 属性 [#属性]

<ParameterList>
<a id="dimensions"></a>
<Parameter name="dimensions">

视频尺寸。详见 [VideoDimensions](/zh-CN/api-reference/rtc/unreal-cpp/class-videodimensions)。默认值为视频大流的 50%。

</Parameter>
<a id="kbitrate"></a>
<Parameter name="kBitrate">

视频码率 (Kbps)。该参数无需设置，SDK 会根据你设定的视频分辨率和帧率自动匹配最合适的码率。

</Parameter>
<a id="framerate"></a>
<Parameter name="framerate">

视频帧率 (fps)。默认值为 5。

</Parameter>
</ParameterList>