viewers are not going to watch it on a 25" or 30" screen. more likely on a 50-65" one.
And that's probably what QC was performed on.
Perhaps you can get a 55" B6 from LG so you have the same perspective. attaches via HDMI2.0 to your DNxIO.
BG
www.finale.tv
From: "John Moore bigfish@pacbell.net [Avid-L2]" <Avid-L2@yahoogroups.com>
To: yahoogroups <avid-l2@yahoogroups.com>
Sent: Wednesday, September 14, 2016 10:34 PM
Subject: [Avid-L2] On the hunt for 4K pixel hits in an HD world?
I'm dealing with some QC flags about flashing red pixels on a 4096x2160 4K project. For the most part I can't see what they are talking about given I only have and HD infrastructure on the monitoring side. This forced me to finally install my DNxIO on my home system to play around. I found at work on an SNDX 8.5.2 the only place I could see the red pixel flash was in single monitor mode stretching the QUI monitor big and the enlarging the image 1X or 2X. Then in some cases I could see what they were talking about.
I brought the project home to look on my Sony PVM-2541 OLED and still the pixel was virtually impossible to see on normal HD downconvert display. Also in yellow mode the red pixel is invisible, yellow/green slightly visible and green and 10 bit green visible but still only in the QUI single monitor mode blown up to 1X or 2X.
With the DNxIO now installed i tried to turn the output to QUAD HD so I could patch any of the 4 quadrants to my Sony OLED. This worked on the scope and the monitor and then I could actually see the red pixel. Still not real obvious but sense I already knew where to look I could see it. This finally proved to me what I had suspected. If I don't have a real 4K pixel for pixel display I can't really play very well with QC.
The test is further complicated by the fact that the project is True pain in the ass 4K, 4096x2160. I found that while the tek 7020 scope and the front display image showed the 4096x2160 quadrant my Sony OLED did not. I attributed this to the fact that the signal was not truly 1920x1080 but more like 2048x1080. Then I found if I switched the hardware to UHD 3840x2160 the monitor locked up. Bouncing between hardware output settings I found that sometimes the Sony monitor would lock in 4096x2160 mode and sometimes not. The same inconsistency happened in 2048x1080 mode but 1920x1080 and 3840x2160 always locked and displayed on the Sony monitor. Just quirky behavior. All this times the image always appeared locked and viewable on the Tek Scope and front panel of the DNxIO.
I'm hoping to get a demo 4K Bolon, not sure it that's the correct spelling, or some other monitor that is 4K to compare how well it will show the red pixel issues etc... I'd also be very curious to see how a Sony BVM of similar 25 inch screen size would show the red pixel. Would it be visible but really small. When I'm in HD downconvert mode I really can't see it but maybe just a hint of it now that I know it's there. If I had that BVM 4K would I be able to see it more pronounced. This is really a small artifact but I'm thinking even with a 25 inchish BVM 4K I still wouldn't catch it. I'm wondering how big the screen is QC is using and will I have to have some giant screen to properly play along with QC.
All this after everyone has noticed nothing in our normal HD infrastructure. Nothing like make due with inadequate equipment for something that will ultimately be choked to death when streamed.
John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net
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Posted by: Bogdan Grigorescu <bogdan_grigorescu@yahoo.com>
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