Sorry in advance Gary but i'm going to be a bit Bitchy about this card and Marketing in general...
There seems to be a lot of Myst about this product.....
At the point of press release this picture came with it.
Implying that it could do 4x 12G in or out. Suggestive sayd it looks like you could config what is in and what is out.. Like a Quad 2 but then 4 channels 12G.
Now the website mentions something else..
UPDATE 11-7-2018:: The image on the website changed again is now Quad IN/OUT as it was at release time, at one point it was 2xin and 2x out.. Which implies more like the 4K pro (which had also 2 SDI in and 2 SDI out.. BUT! only 1 channel for capture.. Because the B input was only for 3D and Dual link.. Something that wasn't clear at all..
Text from the website::
The ultimate digital cinema capture card! DeckLink 8K Pro features four quad link 12G-SDI connections and works in all SD, HD, Ultra HD, 4K and 8K DCI frame sizes. You get support for 8 and 10-bit YUV 4:2:2, as well as 10 and 12-bit RGB 4:4:4 with full Rec. 2020 color. In addition, you can work at up to 60 frames per second in HD, 4K and 8K. The four 12G-SDI connections support 16 channels of embedded audio each, for a total of 64 channels. DeckLink 8K Pro is perfect for the next generation of high resolution, high frame rate and high dynamic range workflows!
Four Quadlink? Wait! it is 1x Quadlink or four connections to make a quadlink. four quadlink would mean 4x4 = 16 connectors guys..
16 channels of audio per channel to sum to 64 channels of audio.. So it does 4x 12G input... But here comes the catch.. Why would it be able to handle 4 quadrants of 4K(12G sdi) (making 8K possible) but not handle 4 channels of 12G-sdi from 4 cameras??
Is that due to in frame sync?
If i sync up all cameras.. Would i be able to run 4 channels 12G same framerate to the card and fool it to capture that as 8K?
So many fuzz and questions about this card..
Sorry to be a little bit "bitchy" about this specs of the card.. But it has all to do with the Myst BMD is keeping over the decklink range of products.. There is no clear statement like hey this can be done with this card. It is all to much suggestive writing of marketing to give the idea the card can do more then it does in real life.
I made indead the same mistake with the 4K pro. Finding out on the forum that it only supports 1 channel while the website was pretty clear about 2x 12G sdi..