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Viewing 4K Clips in 1080 SDI Monitor via TB?
Are there any Thunderbolt products that will convert a 4k signal from Adobe Premiere to make the signal playable in a 1080 SDI-input reference monitor?
Need to send the signal out from the computer via Thunderbolt, no internal cards possible in the new macs. If at all possible, would like to avoid external PCIe boxes.
Premiere will not do the conversion for the monitor signal, so need to find a hardware or hardware driver solution.
Any suggestions?
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12 Replies
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Decklink Ultrastudio 4K…possibly:
https://www.blackmagicdesign.com/products/ultrastudiothunderbolt
Also, putting your footage into a 1080 sequence…
Shane
Little Frog Post
Read my blog, Little Frog in High Def -
Unless Something has changed, Premiere will not scale the video output on a I/O device whether TB or not. Premiere will only scale via the GPU. Since this is video out of the TB versus for the Display I am not sure of a way to convert this. Normally a HDMi to SDI converter would work but TB complicates this since it’s Displayport but via TB.
Eric-ADK
Tech Manager
support@adkvideoediting.com -
Shane’s response is right on the money yet the specs don’t list 4K as a source for downconversion, which is why I think he said possibly. If it can – then it’s probably the least expensive for the purpose.
I don’t think it has anything to do with TB or DP per se – only with device’s hardware down-conversion capabilities.
— Alex Gerulaitis | Systems Engineer | DV411 – Los Angeles, CA
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Blackmagic does not give an option to Scale from 4K to 1080 with the latest driver I have seen. Blackmagic leaves it to the application to handle the scaling when drawing out before signal output. This is why AE and Davinci will scale the 4K output to any resolution you require. However Premiere will not currently do that or allow that via the software. Premiere relies on the Video driver to handle the scaling. So yes it does matter that TB is involved in this case because TB is essentially the Display out for the video card with Displayport packets.
Eric-ADK
Tech Manager
support@adkvideoediting.com -
Matrox and AJA both downscale on the fly. You can check out the TTAP by AJA and Matrox makes a thunderbolt adaptor for the MX02. They may also have something newer.
Peter Garaway
Adobe
Premiere Pro -
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Aja does not mention 4K to 1080P conversion. Are you sure it will handle that scaling?
https://www.aja.com/en/products/kona-3g#techspecs
None of the Matrox devices handle 4K that I am aware of.
Eric-ADK
Tech Manager
support@adkvideoediting.com -
The Decklink Ultrastudio will not downconvert 4k to 1080 according to this previous thread:
https://forums.creativecow.net/thread/124/884441Surprising and disappointing for what is marketed as a cutting edge modern 4k workflow tool.
4k to 1080 conversion seems like such a basic and essential thing in todays environment. Any other thoughts on how to do this via TB?
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Aja makes a device just for the 4K to 1080 conversion.
https://www.aja.com/en/products/mini-converters/4k2hd#techspecs
Gives them more incentive to not include this scaling feature with the I/O hardware.
You might try this Aja device and see if Premiere will scale via the Video driver to 1080 with this used as the output connectivity option. I would suggest you call Aja and see if they have tested that though.
https://www.aja.com/en/products/t-tap#techspecs
Eric-ADK
Tech Manager
support@adkvideoediting.com -
If August is simply trying to view his 4k material on a HD monitor the TTAP will do that.
If you set the output format in the AJA control panel to a HD format you will see your 4k Premiere sequence as 1080p in your output monitor.
Peter Garaway
Adobe
Premiere Pro
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