# IVideoFrameObserver 类 (/zh-CN/api-reference/rtc-server-sdk/python-api/ivideoframeobserver.python)

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

<span className="index-desc-ivideoframeobserver">`IVideoFrameObserver` 类。</span>

<a id="onframe"></a>
## on_frame [#on_frame]

```python
def on_frame(self, channel_id, remote_uid, frame:VideoFrame)
```

<span className="index-desc-onframe">每次收到视频帧时触发。</span>

#### 参数 [#参数]

| 参数 | 描述 |
|---------------|----------------------------------------------------------------------|
| `channel_id` | 频道名称。             |
| `remote_uid` | 远端用户的用户 ID。             |
| `frame`| 视频数据。详见 [`VideoFrame`](/zh-CN/api-reference/rtc-server-sdk/python-api/apidatatype.python#videoframe)         |