Aja Video Source

Hi everyone i tried to get the record flag of a Blackmagic Camera with an AJA video Card because with the BM it’s imposible read the ANC Data, but the AJA plugin have the option for Ancillary this suppostly is all the data recibe from a SDI cable.
Can be possible acces to this data via c++? Because the only variable in ue via blueprint is a boolean

The result I want is the Unreal can detect when a real camera is starting recording and when stop, if anyone know anything about these, please give me a solution or something.
Thank you so much!.