Blackmagic Forum

Hello, I have a machine with two Decklink 4K Extreme 12G cards. Each of these cards has two SDI inputs and two SDI outputs, along with HDMI inputs/outputs and optical SDI inputs/outputs.
I am at a loss as to how I specify what input/output interface I want to use in the API.
I read something about subdevices in the API documentation and I quieried for the number of subdevices like so:
attr->GetInt(BMDDeckLinkNumberOfSubDevices, &subdevs);
But this command returns success and reports only 1 subdevice for each of my Decklink cards, bummer.
Also for some reason, when I try to output video, the only output I get is HDMI, despite me running this command before EnableVideoOutput:
cfg->SetInt(bmdDeckLinkConfigVideoOutputConnection, bmdVideoConnectionSDI);

How do I specify which input I want to use and which output?
I am running Ubuntu Linux and the latest Desktopvideo (10.9.7) with the latest SDK (10.9.5).

I have since figured out that the purpose of the second SDI input and output is for dual link, which I am not using. It would be nice if I was able to use these interfaces for separate video streams.

Only possible on the newer Decklink 8K pro and Duo 2 cards.

A lot of the older cards seem to have dual ports but they are only for Dual link or 3D Stereo use. And not for dual capture as you might think when you see SDI A SDI B.

So the older cards can only run 1 input and or output at once!! Some of the newer cards do support in and out at the same time from the same card. But the older decklink cards don't.

Is only ONE of the newer Decklink 8K pro is enough for the "Resolve Live" (witch requires 2 decklink) ?
Thanks

The decklink 8K is not yet for sale.. They are on the website for quite some time.. But not released to market yet.. So can't tell you as the specs of the card are not defenitive yet!

Hello
buy a DeckLink 8K Pro and I can not separate the connections for input and output, in the Desktop Video 10.11.4 software only captures the capture, not the 4 in-out connections, and so be able to manage in other software as resolume arena 6

Windows 10 pro - 1809
Amd Ryzen Threadripper 2970WX
64 RAM
RTX 2080 TI
Resolume Arena 6

Install Desktop Video 11 that came out today! It supports 4 in or 4 output sdi's.

Xtreemtec wrote:Install Desktop Video 11 that came out today! It supports 4 in or 4 output sdi's.

I saw the announcement. Very thrilled about it. This means I can reduce the number of SDI input cards in my video processor machines and make room for more GPU cards. Currently all slots but one filled up with 4k capture cards.

Just out of curiousity? How many PCI-E lanes are you running in the current setup?
And what motherboard to run it.

I'm busy with a Media Server that has 2x 8K Pro card (4x in + 4x out in 12G) So that is a total of 16 PCI-E Lanes occupied. And then 2 Nvidea Quadro cards which take up 2x 16 lanes. landing me a total of 32 lanes..

Using AMD EPYC architecture, they have 128 PCIe lanes available.

as i understand it, the 4K extreme only has 1 device that supports dual-link and 3D frames. that is what the extra connectors are for they are not separate devices like the duo 2. hence when you attempt to change the profile you get a segmentation fault because the 4K extreme only has 1 profile and no ProfileManagerInterface.

Hi,

I have decklink 8K Pro. I am trying to detect 3D input. I have connected a 3D source to decklink but I am not able to detect 3D signal.

Does someone know how to enable 3D on decklink? How to detect if signal is 3D ?


Thanks
/Jatinder