8K Pro - 1080p60 input automatic detection error (=1080p30)

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engineertony

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  • Real Name: Antony Burness

8K Pro - 1080p60 input automatic detection error (=1080p30)

PostThu Mar 18, 2021 6:47 pm

Hi everyone,

I'm using a Decklink 8K Pro on a windows 10 machine (details below). My input source is an SDI 3G 1080p60 (unknown pixel format) yet the Decklink keeps automatically detecting the input as 1080p30 and doesn't appear to capture on the PC.

The signal outputs/views fine on the BlackMagic SmartScope 4k and a Sony LMD325 monitor.

Using Desktop Video 12 and Media Express there is no video output except for a single half frame that flashes up approximately every 2 seconds.
vMix previews a frame that updates about once every 2-3 seconds and more often than not the frame is corrupted with noise over the majority of the frame.

I've tried what I think is "manually setting the input format" using one of the SDK programs CaptureStills.exe with a whole range of settings including:
Code: Select all
\capturestills -d 0 -m 11 -n 1 -i 1 C:\Temp\
which is meant to try capture 1 frame assuming an input of 1080p60. However the program errors out on a "Timeout waiting for frame".
I've tried in both the SDK 10.11.4 and SDK 12.
I've also tried the CapturePreview.exe that comes packed with the SDK examples with no luck.

Any thoughts or suggestions?

  • Card:
    > Decklink 8K Pro (PCIe)
  • OS:
    > Windows 10 64x
  • PC:
    > Dell T3600 workstation
    > Intel Xenon E5-1607 3GHz
    > 12GB Ram (1600MHz DDR3)
    > NVIDIA P1000 Graphics
    > 1TB SSD - for capture
    > 5TB HHD
Antony B
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Cameron Nichols

Blackmagic Design

  • Posts: 343
  • Joined: Mon Sep 04, 2017 4:05 am

Re: 8K Pro - 1080p60 input automatic detection error (=1080p

PostTue Mar 23, 2021 2:44 am

Hi Antony,

Could you please run prebuilt SDK sample DeviceStatus (or DeviceStatusCSharp) in parallel with Media Express or CaptureStills? Hopefully the detected status flags will give some insight into why the format detection is wrong.

In particular I'm interested to know whether the signal is 422 or 444, single-link or dual-link, ..

Regards
Cameron
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engineertony

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  • Real Name: Antony Burness

Re: 8K Pro - 1080p60 input automatic detection error (=1080p

PostTue Mar 23, 2021 5:52 pm

Hi Cameron,

Thanks for the reply.
Attached are the screenshots at Full (SDI 1,2 in 3,4 out) and Half Duplex (SDI 1io, 2io, 3io, 4io).

At Half Duplex (I think that is the correct phrase). It looks like the Decklink is struggling to lock onto the signal. The Video Input Locked state toggles rapidly between True and False.
20210323 Device status with capture (1io, 2io, 3io ,4io).PNG
Device status during capture, SDI inputs set to 1io, 2io, 3io, 4io
20210323 Device status with capture (1io, 2io, 3io ,4io).PNG (41.23 KiB) Viewed 431 times


Also tried setting to Full Duplex (I don't understand these settings very well sorry).
20210323 Device status with capture (1,2in, 3,4 out).PNG
Device status during capture, SDI inputs set to 1+2 in, 3+4 out
20210323 Device status with capture (1,2in, 3,4 out).PNG (46.67 KiB) Viewed 431 times


=======================
Also UPDATE on other things tried.
  • Saw another thread about possible issues with PCIe 2 vs 3 slot. I've tried both, no change, currently in PCIe 3 slot.
  • Saw a thread on issues with the DesktopVideo12 and Windows 20H2 update. I've tried reverting to 10.11.4 and 11.0 with no change. Back to v12 now.
Antony B
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Cameron Nichols

Blackmagic Design

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Re: 8K Pro - 1080p60 input automatic detection error (=1080p

PostWed Mar 24, 2021 6:38 am

Hi Antony,

As a comparison, the following screenshot shows the expected DeviceStatus windows for when the input is locked to 1080p60. Note the Detected video input status fields - these aren't present in your capture, so I suspect that the DeckLink has not been able to determine the input signal or SDI payload. Are you able to share details of your source?

DeviceStatus-Detected1080p60.png
DeviceStatus-Detected1080p60.png (20.78 KiB) Viewed 413 times


Regards
Cameron
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engineertony

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Re: 8K Pro - 1080p60 input automatic detection error (=1080p

PostThu Mar 25, 2021 4:28 pm

Hi Cameron,
Thanks for the quick response.
Hmm that does look a lot better in your capture.

Unfortunately the source for our system is a custom board that was made by a supplier. I have requested additional information from them in regards to the signal format and if there is something unusual in their encoding format (maybe HANC instead of VANC). It uses a custom FGPA to process a pair of stereographic CMOS sensors into a pair of SDI signals, and the only details I have about the signal is that it is 3G 1080p60.

I find it weird that the SmartScope and Sony Monitor manage to present the signal ok, maybe they have a more robust signal processor? Additionally I have a cheap and cheerful SDI->HDMI converter that when plugged into a similarly cheap and cheerful HDMI->USB capture device can capture the video fine (just does it at a lower quality with a slight colour shift).

Do you think I need to look into frame synchroniser (like a yellobrik PVD1800) or similar?

Thanks.
Kind regards,
Antony
Antony B
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Cameron Nichols

Blackmagic Design

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Re: 8K Pro - 1080p60 input automatic detection error (=1080p

PostFri Mar 26, 2021 10:19 am

Hi Antony,

Are you able to check whether you can capture the dual-link stereoscopic signal when you are in either 1 sub-device half-duplex or 1 sub-device full-duplex profiles? Both these profiles support dual-link capture - see the connector mapping in section 2.4.11 of the DeckLink SDK Manual.

Regards
Cameron
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engineertony

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  • Real Name: Antony Burness

Re: 8K Pro - 1080p60 input automatic detection error (=1080p

PostMon Mar 29, 2021 1:30 pm

Hi Cameron,

I hope you had a good weekend. Thanks again for your help on this.
I've tried the following connections and capture profiles, still no video shown in CapturePreview or MediaExpress.

Full Duplex with SDI feeds in SDI 1 and SDI 2
20210329 Full 1+2.png
Full duplex
20210329 Full 1+2.png (220.14 KiB) Viewed 316 times


Half Duplex with SDI feeds in SDI 3 and SDI 4
20210329 Half 4+3 (2).png
Half duplex
20210329 Half 4+3 (2).png (99.69 KiB) Viewed 312 times


Let me know if I connected the feeds/channels to the wrong SDI ports for each setup.
I did try other combinations of feeds into the other SDI ports but didn't get a "video input locked" TRUE flag with the others.

The signal appears to lock and convert fine on a the SDI->HDMI LiNKFOR (amazon) converter with 1 channel/eye at a time.

Thanks again.
Kind regards,
Antony
Last edited by engineertony on Mon Mar 29, 2021 2:25 pm, edited 1 time in total.
Antony B
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engineertony

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Re: 8K Pro - 1080p60 input automatic detection error (=1080p

PostMon Mar 29, 2021 2:17 pm

Hi Cameron,
I've also just tried a AJA Hi5-3D unit, not sure if it helps but thought getting a second data point might help.

It doesn't look like the unit is compatible with 1080p60 but I thought I would try as the manual notes "p60 functionality may be added at a future date".
The detected signal formats are listed on the left port.
Unfortunately the resulting input was just garbage, depending on the output mode, it was just a series of single pixel brightly coloured lines.

AJA Hi5-3D output.jpg
HDMI output (AJA Hi5-3D)
AJA Hi5-3D output.jpg (875.18 KiB) Viewed 314 times

20210323 AJA capture formats.PNG
AJA Hi5-3D control window
20210323 AJA capture formats.PNG (63.04 KiB) Viewed 314 times
Antony B

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