I would try something like that:
<consumers>
<decklink>
<device>1</device>
<key-device>2</key-device>
<embedded-audio>true</embedded-audio>
<channel-layout>stereo</channel-layout>
<latency>normal</latency>
<keyer>default</keyer>
<key-only>false</key-only>
<buffer-depth>3</buffer-depth>
<custom-allocator>true</custom-allocator>
</decklink>
</consumers>
Oh yes, there was something with that embargo. But don’t let us talk about politics, it is crazy enough and we will not change a bit.