i have one of these cards in a server on a tour.
we are back out next week. and i can check to see if it will do a key and fill pair in 2k
i don’t use it that way, but i can test it for you. all so i think in will have to test it at i5994 as i dont think i have any thing that will take a pal fill and key pare. i do have some Barco image pros that will take the signal. how ever i will not be able to see if they are in sync.
jyeomans, I am in 59.94 land also, so that test will be useful for me. You might be able to test even higher resolutions if the card will support a key/fill output and two inputs.
Here is a testing method I would try:
Configure 3 casparcg channels. 1 key/fill channel with decklink output and two channels with decklink input and screen consumer outputs.
I would try outputting a simple pattern key/fill to output 1 in your native resolution and imputing it on port 3 and 4 to a screen consumer. With the quad 2, there are some port configuration and indexing oddities to be ware of that might apply to this card also.
Once you have a key/fill pair with a simple graphic with alpha going out ports 1,2 and in to two channels with screen consumers on ports 3 and 4, then increase the resolution up to 2160p to see if it works. This resolution increase could be done incrementally if going direct doesn’t work. This way you don’t need an actual 4k device to view the signal.
I look forward to seeing what test results you come up with.
Would be nice to know if it works in 4K 
Thanks for willing to test this for us. If it works in 59.94 fps it sure will also in 50 fps.
i Am sorry
the server that i thought had an 8k decklink card in it
does not. it has an quad 2.
i thought it had an decklink 8k as it was the newest and we talked about using that card.
my apologizes.
Hahaha, what a pitty. Never mind! Thanks for posting back. 
Hi everyone, I recently tested my machine with a Decklink 8k Pro. It works in 2160p50 incl. key output. The config of channel 1 is identical to my Duo2. Key output is on connector 2 on the 8k Pro. BUT there are no additional output channels possible as the 8k Pro is only one Decklink device to the system. If the card is set to In & Out Mode via BM Software, connector 3 can be use as an input but no more outputs possible.
I also mentioned that e.g. the Transform, Anchor Point and Distort Tools are not working in 2160p (V2.2.0).
Thanks for testing and posting back. That is good to know.
Originally the DeckLink 8K Pro was only a single channel card (similar to the DeckLink 4K Pro) with the multiple connectors only used for dual-link or quad-link SDI input and output.
As of a firmware update included with Desktop Video 11.0 in March, the DeckLink 8K Pro is now like a 4K version of the DeckLink Duo 2. Each of the 4 SDI connectors can be independently assigned as inputs or outputs (so you could have four 4K inputs, four 4K outputs, or two in/two out).
When setup for keying, the DeckLink 8K Pro is capable of outputting two independent fill and key signals simultaneously. Here is the link to the announcement from Blackmagic:
https://www.blackmagicdesign.com/media/release/20190305-04
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That is awesome! I had suspected the card was capable of that, but didn’t have evidence the firmware was set up to allow it. This might be why BMD had such a hard time confirming exactly what functionality this card was meant to have back when I called them about it…
Does anyone have a working config for two fill & key using the 8K pro? I’m trying to install one (currently working in 1080i50) and not having much luck getting anything out of it in either 4 independent channels (and trying to get the external_separate_device to work - keep getting an error that it cannot set up a fill output on channel 2 which I had specified as key only) or just a single channel with key (output 2, which I assume would be the fill, turns itself off for some reason).
Relevant section from my config (in 4 channel mode):
<consumers> <decklink> <device>1</device> <embedded-audio>true</embedded-audio> <keyer>external_separate_device</keyer> <key-device>2</key-device> <key-only>false</key-only> </decklink> <decklink> <device>2</device> <embedded-audio>true</embedded-audio> <key-only>true</key-only> </decklink> <decklink> <device>3</device> <embedded-audio>true</embedded-audio> <keyer>external_separate_device</keyer> <key-device>4</key-device> <key-only>false</key-only> </decklink> <decklink> <device>4</device> <embedded-audio>true</embedded-audio> <key-only>true</key-only> </decklink> </consumers>
Hi,
I have a DeckLink 8k Pro fully functional, double channel fill+key
for me the trick was in the blackmagic settings: 1ºin+2ºout and 3ºin+4ºout
in this way the f+k are linked together and perfectly in sync
(external keyer)
I tried only in 1080@50i, I don’t have any way to test higher resolution at the moment
would you mind posting your config file?
Sorry for the long long time
Deckling 8k Pro works really fine with CasparCG
the channels needs to be linked in Blackmagic tool 1&2 and 3&4
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<paths>
<media-path>media\</media-path>
<log-path>log\</log-path>
<data-path>data\</data-path>
<template-path>templates\</template-path>
<thumbnails-path>thumbnails\</thumbnails-path>
</paths>
<channels>
<channel>
<video-mode>1080i5000</video-mode>
<consumers>
<decklink>
<device>1</device>
<embedded-audio>true</embedded-audio>
<channel-layout>stereo</channel-layout>
<latency>normal</latency>
<keyer>external</keyer>
<key-only>false</key-only>
<buffer-depth>3</buffer-depth>
</decklink>
<system-audio />
</consumers>
</channel>
<channel>
<video-mode>1080i5000</video-mode>
<consumers>
<decklink>
<device>2</device>
<embedded-audio>true</embedded-audio>
<channel-layout>stereo</channel-layout>
<latency>normal</latency>
<keyer>external</keyer>
<key-only>false</key-only>
<buffer-depth>3</buffer-depth>
</decklink>
<system-audio />
</consumers>
</channel>
<channel>
<video-mode>576p2500</video-mode>
<consumers>
<screen>
<device>1</device>
<windowed>true</windowed>
<key-only>false</key-only>
<name>[Preview]</name>
<borderless>false</borderless>
</screen>
<system-audio />
</consumers>
</channel>
</channels>
<controllers>
<tcp>
<port>5250</port>
<protocol>AMCP</protocol>
</tcp>
</controllers>
</configuration>
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I think this problem solved in newer blackmagic driver version 11.6
Yes, I will try it
So far so good,
I have tested 2160p@2500, 2160p@5000, 2160p@6000 both single channel anche dual channel and it works very well, I can see both fill and key for all of the four SDI output.
I cannot try for the actual sync between fill and key but since they are managed internally I do not expect any out of sync issue.
But if needed I could find a creative way to do that, but the real test would be with a proper 4k mixer which unfortunately I do not have.
Let me know if other resolution and frame rate are needed
That’s great!
That indeed does not confirm the sync, but it’s a good first indication. The resolutions you specified are fine for now.
Would love to know if the sync is also correct. For now, I will offer this solution to my client. If you ever get the opportunity to test the sync with a 4k mixer, I would love to hear the results.
If my client accepts the offer and I get my hands on the hardware, I will post the results here as well.
nice to hear that
unfortunately I have no opportunity to try a 4k mixer
the only thing that I can think of is to made a precise timed loop template, record a unique clip switching input and then put it on a editing software.
Very unorthodox and out of the box way to check synchronisation 
Hi all, just bumping this topic:
I have had no luck at all in getting 2 x 1080i SDI Key + Fill outputs working on an 8kPro Decklink, with any of the configs posted above, or with any other configurations I’ve tried.
Has anyone had recent success with this? And if so, could you post a known working config file?
Many thanks!