Why did not it come out in the Blu-ray image is TVS?

I have one question.
I have products with ATEM Television studio.
And have a blue-ray player.
Blu-ray players, video of 1080i ===> Atem's HDMI 1 Port input
However, Preview screen only comes in black.
Some people say "do not support 'hdcp' from Television Studio"
I would like to know the facts.

Blu-ray output: 1080i
Atem input formats: 1080i 59.94
Hdmi cable.

Why did not it come out in the Blu-ray image is TVS?
I'm waiting for an answer.

Some people say "do not support 'hdcp' from Television Studio"
I would like to know the facts.

This is the fact !

HDCP is a copy-protection. When ATEM detects it in HDMI-stream, it switches the input to black.