Up to this point, everything is configured except the video system. But without video, flying is only half as fun. Setting it up depends on whether you have an analog or digital video transmitter (VTx). Let’s start with analog:

Setting Up an Analog VTx

This only works if you selected VTX when building the firmware and flashed it. Otherwise, the Video Transmitter tab won’t appear.

If nothing shows up in the tab—which is usually the case unless the VTx is integrated in an all-in-one (AiO) board—you’ll need the correct VTx table for your transmitter.

• Search online using your VTx model name + “VTx-Table”
• Or check the manufacturer’s website.

Once you’ve downloaded the appropriate .json file for your VTx:

1. In the Video Transmitter tab, click Load from File (bottom right) and open the .json file.
2. You should now see which bands, channels, and power levels are available.
3. If you’ve correctly configured the SmartAudio or IRC-Tramp interface (in the Ports tab), a selection menu will appear where you can choose band, channel, and output power from the dropdowns.

Betaflight can now communicate with your VTx via SmartAudio or IRC-Tramp, allowing you to adjust settings either in the configurator or directly in your goggles.

Setting Up a Digital VTx

For an O3 or O4 Air Unit, or a Walksnail VTx, setup is very simple:

1. Go to the Presets tab and type "OSD for" in the search bar.
2. Click the tile that appears.
3. Choose the UART where your Air Unit’s Tx and Rx cables are connected.
4. Click Select, then Save and Reboot.

The preset will automatically adjust all settings so the OSD works with your digital system.