LiveLink - Apple AR not work in a packaged game

Development Platform & Builds XR Development
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1

I want to make an AR face app like Face AR Sample. via Live Link Face app.

Everything works just fine in editor, but after I packaged the project for windows platform, the live link not work anymore.

As this doc said,
I’ve tried add -messaging to command line, but not work.

My game mode is such as

311239-gamemode.png
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I printed “GameStart” to ensure game mode is running.
Then checked command line args.

311240-cmdline.png
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And as @PHScatena mentioned in this ANSWER, I tried to apply a preset (in fact , I can not save any data from the Live Link Window)

311263-applypreset.png

At final, I tried the blueprint in this article

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Everything works just fine in editor, but after I packaged it. the app not work anymore.

311272-ret.jpg
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2

4.26 has fixed this issue.

3

Hi, could you please elaborate more about 4.26 fixing the problem? Maybe a snapshot of the setup? It doesn’t work for me even in 4.26.

Thanks a lot!
Aey

4

Are you using mac or windows? In my exp, Mac ver still not work, but windows version worked at 4.26

5

I am on windows, but some of the nodes they mention in the documentation seem to be old dated and I won’t have those nodes available. Would you mind sharing a snapshot of the setup for 4.26? I am fairly new to unreal and coming up with my own setups is still a bit of a challenge for me.

Thanks a lot

6

I’m just using the ARFaceSample. It’s now can be packaged to a windows version exe and works well with my iPad.

7

Geniusgeng Hi, I also have this problem, can you help me too? Email:
Thank you

8

@geniusgeng Could you explain what you did to make it work? I have been looking on every forum and you are literally the only one who has fixed the issue!

9

Hey, i just go the FaceAR Sample working in a packaged build 4.27. First of all you have to make sure everything works fine in the editor. Then for me what it took was :

  • Creating a LiveLinkPreset and setting it to the Default Live Link Preset in Project Settings > Live Link like @TommasoKB suggested

  • CLOSE THE EDITOR WHEN YOU LAUNCH YOUR EXECUTABLE. You can only have 1 LiveLink “instance” working. Standalone Play is therefore not compatible because you have the Editor + Standalone.

I didn’t have to add -messaging to my executable. Don’t know why.

Also helpful to debug LiveLink connection is the console command : “LiveLink.ShowDebugInfo”. It show nothing when no subject are connected but the moment my iPhone is detected it shows in the bottom right corner of the screen.

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