Blu-ray Subtitle

[onedev]

Hello,

I hope to find somene here who has experience with getting forced subs on Blu-ray. As I understand there are two ways:

1.) A general force flag inside the BDStructure, but was not able to see in BDEdit as example.
2.) A bit in each subtitle packet.

Anybody know where the force sub is stored in the BB structure?

Thanks,

Ingo