メタ:
- id: en/ue5-camera-app-ndi
- slug: en/ue5-camera-app-ndi
- url: /blog/en/ue5-camera-app-ndi/
- title: Building a simple UE5 viewer that switches between three NDI camera feeds
- date: 2024-02-25T01:43:00+09:00
- tags: UE5, NDI, Video Streaming, Projects
> **Note:** This article is more than one year old.
> - Compatibility between UE's NDI receiver and mobile sender apps depends on their versions. Check the release notes for both the plugin and the app.
> - Camera permissions, background behavior, and resolution presets on iOS and Android can change with OS updates.
> - Check NDI's terms of use and bandwidth requirements for your environment.
In the previous article, I sent three USB camera feeds over the network using NDI. This time, I will build a UE5 viewer that receives those feeds and switches cameras with the number keys.
Related USB camera listings: Search Amazon for USB cameras (Ad)
Previously: sending three USB camera feeds over the network with NDI
Receiving and displaying NDI video in UE5 (Unreal Engine 5)
I opened UE5.2 and made the following project, with four CameraActors and three NDI screens.
I had already enabled the NDI plugin.
I also created three NDI receiver configurations.
I made a Blueprint that switches cameras when a number key is pressed.
0 shows the overview, 1 the left camera, 2 the center camera, and 3 the right camera. The overview is shown initially.
The video showed ghosting, so I set the following option to None.
I could now switch between the NDI camera feeds like this. It may not be a particularly practical use of UE5.
However, an NDIIO error prevented me from exporting the app, and I initially gave up. After about 30 hours of trial and error, I solved it. The following NDIIO error caused BUILD FAILED.
```
Expecting to find a type to be declared in a module rules named 'NDIIO'... This type must derive from the 'ModuleRules' type defined by Unreal Build Tool
UATHelper: パッケージ化 (Windows): BUILD FAILED
```
The NDIIO plugin did not seem to be packaging correctly. I moved NDIIO from the UE\_5.2 folder into the project. This was a move, not a copy: I did not leave the original folder in place.
`C:\Program Files\Epic Games\UE_5.2\Engine\Plugins\NDIIO\`
For example, if the UE5.2 project folder is named ndiplayer05:
`C:\Users\----\Documents\Unreal Projects\ndiplayer05\`
I created a Plugins folder there and moved the entire NDIIO folder into it. The build then succeeded.
Moving the plugin allowed it to be recognized.
