# UDP / TCP - Best

This method uses FFmpeg to stream video directly from OBS to the AI PC. It requires precise configuration.

### 1. OBS Video Configuration

First, set up the scene and resolution just like the NDI method.

1. Open OBS and go to **Settings > Video**.
2. **Base & Output Resolution:** Set both to `640x640`.
3. **FPS:** Set to **Fractional FPS**, with a numerator of `120` or higher.
4. **Scene:** Add a **Display Capture** source for your main monitor.
5. **Center:** Press `CTRL` + `D` to center the capture.
6. **Lock:** Right-click the preview and select **Lock Preview**.

### 2. FFmpeg Output Configuration

This is the critical step for network streaming.

1. Go to **Settings > Output**.
2. **Output Mode:** Set to **Advanced**.
3. Go to the **Recording** tab.
4. **Type:** Select **Custom Output (FFmpeg)**.
5. **FFmpeg Output Type:** Select **Output to URL**.

#### Configure the Stream Settings:

* **File path or URL:**
  * Replace `IPV4_ADDRESS_SECOND_PC` with the actual local IP of the PC running SpectraAI.
  * **Format:** `udp://IPV4_ADDRESS_SECOND_PC:1234?pkt_size=1316`
* **Container Format:** `mpjpeg`
* **Video Bitrate:** `3000 Kbps`
* **Keyframe interval (frames):** `1`
* **Video Encoder Settings:** `-preset ultrafast`

### 3. How to Start

The startup order depends on whether you are using UDP or TCP.

#### For UDP (Recommended):

1. In OBS, click **Start Recording**.
2. Then, start **SpectraAI**.

#### For TCP:

1. Start **SpectraAI** first (it needs to listen for the connection).
2. Then, in OBS, click **Start Recording**.


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