Vuforia - Saving background texture

Hello,

I already asked the answer on Vuforia's forum, without answer, so I'm trying here as it's maybe more Unity-related.
I'm trying to extend the "Background Texture" sample to be able to send the pixels data of the video texture to a Plugin.

I can get the data in the Editor, but when I test on iOS, the texture is empty.

Here is what I did :

1. Setting mTexture to public in VideoTextureBehaviour.cs
2. In another script, on a press on a GUI Button (far after the texture is properly initialized), I'm creating my own texture and set its pixels :

// Texture creation :
Texture2D myTexture = new Texture2D(
_VideoTextureBehaviour.mTexture.width,
_VideoTextureBehaviour.mTexture.height,
TextureFormat.RGB24,
false
);

// Prints 1 on iOS
Debug.Log ("Video Texture length : " + _VideoTextureBehaviour.mTexture.GetPixels32().Length );

// Sets texture bytes :
myTexture.SetPixels32( _VideoTextureBehaviour.mTexture.GetPixels32() );
myTexture.Apply();

// Saves empty texture on iOS, but correct in Editor:
byte[] TexAsBytes = myTexture.EncodeToPNG();
File.WriteAllBytes(Application.persistentDataPath + "/myTexture.png", TexAsBytes);

Is there something I'm missing there on iOS ?

Thanks !

 

Were you able to solve this? I am gettings same problem on IOS. Its empty