1080PsF & Constellation

Questions about ATEM Switchers, Camera Converter and everything live!
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maniacpony

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1080PsF & Constellation

PostThu Jan 16, 2025 9:28 am

I have some lovely proper triax studio cameras - Sony HSC-300Rs with decent B4 mount lenses, but these will only work up to 1080i or 1080PsF25 mode (or 720p50). In both 1080i50 and 1080p25 on the ATEMs, I get nasty aliased edges. Trialling with a Sony Ex3 (which also outputs 1080PsF25) and inserting an UpDownCross HD improves it somewhat. But i'm aware that other users have said they don't like the way the basic Blackmagic converters handle format conversion "in the Terranex style", albeit this was referring to interlaced source footage, rather than my "progressive encoded as interlaced".
Is there a way to get the ATEMs to handle the feed better for progressive broadcast? Or can anyone recommend a better encoder (without breaking the bank) to ramp it up to 50p for the ATEM? Are there more / better options on the rack mount teranex boxes, or do I need to be looking at coverters with a yellow or red paint job? ;)

I'm not filming any exciting fast moving action, so am more interested in the resolution of 1080, than the benefits of high frame rates.

Cheers, Mat.
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ManchesterV

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Re: 1080PsF & Constellation

PostThu Jan 16, 2025 1:30 pm

We used 1080 PsF with the older TVS HD setting the ATEM to 1080i. We sent PGM out to a Terranex 2D which correctly recognised the 2:2 pulldown of PsF and output it as progressive.

All inputs had to match on that switcher.

If you send PsF into an ATEM with built-in scalers set to 1080P then the ATEM will see PsF as 1080i and attempt to de-interlace it (even though it doesn't need to do so).

If you set your Constellation to 1080i and it should pass the image straight through without mashing the image.

As you've mentioned the other option is to put a converter on the output of each camera to change to true progressive. You are quite correct that the UdX converters don't do it quite so well as other coloured units do.
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maniacpony

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Re: 1080PsF & Constellation

PostFri Jan 17, 2025 3:39 pm

One of the reasons I'd avoided working natively in 1080i was that I have some sources from Birddog P120s, and there was a bug with their 1080i output, so had been sticking to progressive modes. They do full progressing, so PsF wasn't an option. Will have to try again and see if they've fixed the bug!

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