Display 4K on a 1080 Monitor?

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Ric Murray

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Display 4K on a 1080 Monitor?

PostTue May 04, 2021 4:21 pm

I have a Decklink 4K in a 2019 Mac Pro tower, connected by SDI to a 1080 Flanders monitor. Using Premiere Pro or Resolve I get playback on the Flanders if the timeline is set to 1080p 23.98 fps. Is there a way to get a 4K timeline to scale down on the fly to the 1080 monitor? Do I need additional or different hardware?
Creativity is the ability to accept ambiguity.
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Andrew Kolakowski

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Re: Display 4K on a 1080 Monitor?

PostFri May 07, 2021 2:10 pm

If you have DeckLink SDI 4K then this card doesn't support hardware UHD->HD down convert (only HD to SD).
Only way to get preview out of UHD Resolve projects is set it correctly in video monitoring section. Timeline can be UHD, but monitoring needs to be set to HD. You also need to set scaling properly so you don't have centre-cut, but proper downscale.
In Premiere only way is to work in HD timeline during editing and then switch to UHD for export. There is no separate scaling for BM monitoring itself.

There are other models, like DeckLink 4K Extreme which support scaling performed on the card itself.
Not many do it and watch for this section in card description:
"Ultra HD Down Conversion
Built in, high quality hardware down converter outputs Ultra HD to HD..."
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stanparker

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Re: Display 4K on a 1080 Monitor?

PostWed Aug 24, 2022 8:28 pm

I have the same question a year and a half later and just wanted to refresh this thread to see if there's any new answers.

I'm running Mac OS 12.5, using a DeckLink Studio 4K to output SDI to a 1080p monitor. Would love to be able to monitor 4K playback in Premiere Pro on my 1080 monitor without having to shell out another grand on the 4K Extreme or have to switch to Resolve.
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Andrew Kolakowski

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Re: Display 4K on a 1080 Monitor?

PostThu Aug 25, 2022 9:03 pm

Set Premiere project to HD for editing.
Then switch to UHD for export.

Card has no UHD scaler, so nothing you can do on hardware side. Let Premiere scale it for you.
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olsen_jolie

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Re: Display 4K on a 1080 Monitor?

PostTue Sep 13, 2022 6:49 am

Hello!
Upgrade to a system with a higher resolution if you wish to show 4K on a 1080p monitor. High-quality resolution is produced by a 4k monitor, however it can slow down your computer. You won't notice a resolution change, but a strong GPU is required to play 4K on a 1080p monitor.

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