Failed to set media texture to a media texture which is from "Construct object from class"

Development Asset Creation
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13

I spawn multiple media players in my Sandbox game so I think I’ve figured this one out; it seems that when you set the source of the media player, the media texture seems to loose it’s link to the media player; so when it’s trying to read data it simple has no “media player” to read data / frames from.

The solution is to force an update of the underlying media texture resource, but it requires some C++.

In your xxx.build.cs make sure you have the “MediaAsset” dependancy:

PublicDependencyModuleNames.AddRange(
    new string[]
    {
                "Core",
                "CoreUObject",
                "Engine",
       ...
                "MediaAssets"
    });

Then in a C++ actor, include the header at the top…

#include "MediaTexture.h"

Then inside your C++ object (the header file) - create a static function to do the magic:

UFUNCTION(BlueprintCallable, Category = "Modiverse")
	static void UpdateMediaTexture(UMediaTexture* mediaTexture)
	{
		mediaTexture->UpdateResource();
	}

Then BP process was similar as mentioned; create media texture in constructor script (not sure this is still required) and then in my “spawn” event I create media player, dynamic material (with a texture parameter set to the media texture), get my 3D plane and set it’s material to this dynamic material instance and finally I “Set Media Player” on the media texture (pointing it at the media player)… I then “Open URL” and after that call the above “UpdateMediaTexture” BP node to fix it… Seems to work fine in editor and published game!!

Hope this helps someone out!

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