Resolved Issue with AR core Extensions package

I installed ARCore Extensions package from here
https://developers.google.com/ar/develop/unity-arf/getting-started-extensions
Then i managed to record a scene with record and playback but when i try to playback it doesnt work my code is

Code (CSharp):

1. public ARSession m_Session;
2.     public void loadSceneMP4(string path){
3.         if (m_Session.subsystem is ARCoreSessionSubsystem subsystem){
4.             var session = subsystem.session;
5.             session.enabled = false;
6.             session.SetPlaybackDataset(path);
7.             session.enabled = true;
8.         }
9.     }

it throws me this error
'ARCoreSessionSubsystem' does not contain a definition for 'session' and no accessible extension method 'session' accepting a first argument of type 'ARCoreSessionSubsystem' could be found
so my question is how i get it to work, in docs there is no info how to implement playback with arcore using unity.

Someone tell me i can follow this code in
https://github.com/Unity-Technologi...Assets/Scenes/ARCore/ARCoreSessionRecorder.cs
But as noted it doesnt work i think is for old version of arcore for unity...
So how i get it to work?
i want to playback video thats all

note i follow this
https://developers.google.com/ar/develop/unity/recording-and-playback/developer-guide
i found there is no session object anywhere and ARSession doesnt have any playback method
Thanks for time to read i hope i get an answer

 

for some reason i cant get it to work with that documentation, i dont know if i am missing a namespace or something but google docs didnt help thats why i was trying that github code form a depreceated version

 

i think it could be that i am using AR Foundation (some version) and playback is available in this other version, i dont remember where i saw it but in my package manager of unity 2020.3 there is no apparent update for any AR packages, i have version 4.1.10 and i read that playback was available in a new version, (i dont remember where i read it) so i will try with a newer version of unity maybe it should appear an update in package manager... i dont know

 

Ok i managed to compile now i will try it on android, thanks

 

I have a new issue when i call

Code (CSharp):

1. session.SetPlaybackDataset(path);

it crashes but i will do another post thanks for replying