Doses DeckLink Mini 4K Monitor support 12bit RGB 1080p 24?

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hyongmin

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  • Real Name: Hou Yongmin

Doses DeckLink Mini 4K Monitor support 12bit RGB 1080p 24?

PostThu Oct 11, 2018 8:36 am

Hi,

I have a "DeckLink Mini Monitor 4K" card.

And I want to use it output 12Bit RGB 444 1080p 24fps to a X300 monitor.

I modified the Sample "TestPattern" in the BM release SDK.

But the result shows not correct.

My question is whether "DeckLink Mini Monitor 4K" support 12Bit RGB 444 output?

Even if I set the output to 10Bit RGB444, then I set the X300 input format is RGB10bit 444, the display is black, but I set the X300 input format to YCbCr422 10 bit, the display is correct.
The 3G-SDI can't support RGB444?

Yongmin Hou
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hyongmin

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  • Joined: Thu Aug 23, 2018 8:22 am
  • Real Name: Hou Yongmin

Re: Doses DeckLink Mini 4K Monitor support 12bit RGB 1080p

PostThu Oct 11, 2018 8:48 am

I read the spec of "DeckLink Mini 4K Monitor" carefully.

https://www.blackmagicdesign.com/products/decklink/techspecs/W-DLK-32

In the "Connection" it said that
SDI Video Outputs
1 x 10 bit SD/HD/Ultra HD switchable.


But in the "Video Standards" it said that
SDI Color Precision
8, 10, 12-bit RGB 4:4:4 in all modes up to 1080p60, and 8, 10-bit YUV 4:2:2 in all modes.


I am confused. Whether this card support 12 bit?
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Ingmar Rieger

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Re: Doses DeckLink Mini 4K Monitor support 12bit RGB 1080p

PostFri Oct 26, 2018 3:08 pm

Hey folks,

I'm also fighting with the DeckLink Mini Monitor 4K and 12 bit RGB currently but just fixed the bug while looking at my code when writting this. I can say: It works.

There are two small tools I play with using the DeckLink SDK to output video via SDI and on both I have different formats implemented, one of them being bmdFormat12BitRGBLE for 12 bit and I get output to the VideoAssist 4K I have currently on my desk. Tested with 1080p24 and 1080p60 and the image looks right.

PS: And normally 3G-SDI should be enough for at least 10 bit RGB (not sure about the frame rate, but I think it was 2K p30 with RGB12 that was too much for 3G but 24/25 worked afair). A fast Google search brought me this: https://wolfcrow.com/blog/what-is-6g-sdi/
Greetings
Ingmar Rieger

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