EVA1: Trouble with Atomos Outputs

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filmguy123

Veteran
I was under the impression the EVA1 could do 4K/60p @ 10-bit ProRes to an external recorder?

My understanding is this cannot be done via VFR mode when utilizing HDMI since it cannot read VFR, only timebase. So I set frequency to 50p or to 59.94hz, but then the Atomos starts flickering like crazy and is useless. So I need to change under HDMI out the quality down to 420/8-bit and then it stabilizes.

So, how can I output 4k/60p @ 10-bit 422 to ProRes? Or does this need to be done via SDI only?
 
Hi mate when I get a moment I will check on mine for you, unless someone comes along first...
 
filmguy123 said:
Thanks Noel. I am also wondering if my cable is not 2.0 or something, a bit stumped here!
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I'm just pricing out an EVA1 kit for a new studio and I have wondered about hdmi 2.0. I haven't seen any cable longer than like 30" that also says its HDMI 2.0. We will be using a Atomos Sumo and I wanted it to be further away than that. Do long HDMI 2.0 cables exist? I know SDI recording is only up to 30p.
 
Is HDMI 2.0 required for DCI 4K/60p but not UHD/60p on the EVA1?

Just curious because I used a regular HDMI cable with the LS300/Inferno for UHD/60p.
 
No idea. I thought I had bought a HDMI 2.0 cable so this really may not be the issue. I will do some more testing but right now I am just frustrated as I can't output 4k/60p, the Atomos just freaks out on me.

I am running AtomosOS 9.0 and EVA1 2.02 (newest on both).
 
Nothing will output stable to the Atomos in either UHD or Cinema 4K in either 50p or 60p unless I bump down to the 420/8-bit HDMI output option in the EVA1 menu.
 
filmguy123 said:
Nothing will output stable to the Atomos in either UHD or Cinema 4K in either 50p or 60p unless I bump down to the 420/8-bit HDMI output option in the EVA1 menu.
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Weird...if it's not the cable, it sounds like a quirky technical issue with 4K/UHD 10-bit 60p output from the EVA1. I've seen other videos online labeled as 10-bit 4K/60p but who knows.

Quirky technical issues have always existed with cameras/recorders since the beginning of their existence, but Atomos does list the support.

Your flashing issue is very familiar to me as a non-supported signal sign in my particular experience.
 
Sounds like a signal compatibility issue between our output an Atomos’ input. First I have heard of it. The issue could rest on either end. Have you contacted technical support at both companies? We can’t really help until you ask for it.
 
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