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Downconvert/Field Issues-Upper vs Lower?
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[Kevin Wild] “Nobody is downconverting?? These seem like obvious bugs…I can’t imagine we are the only ones having these problems.”
We downconvert almost every day using our Konas. We don’t use the Convergent Design boxes. No issues with fields here at all.
Walter Biscardi, Jr.
https://www.biscardicreative.com
HD Editorial & Animation for Broadcast and independent productions.All Things Apple Podcast! https://cowcast.creativecow.net/all_things_apple/index.html
Read my blog! https://blogs.creativecow.net/WalterBiscardi
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Walter, do you guys use Kona 2′ or 3’s?
Again, this is absolutely a real bug; AJA took a while but acknowledged they are seeing it when I called them. But this was using LH’s.
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kevin
I have 4 boards ( K2, K3, K3x and LHe) and I am not seeing it on my downconverts
what size text are you seeing this on,
and have you tried changing the vertical position a pixel or 2?
gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows -
Sorry to keep dragging this out…
I have not tried that, but I seriously don’t think that will help from the way the image is. I actually took a picture of it on my iPhone and sent it to Tech Support while talking with them. It’s a real issue.
To recreate, just use either Boris or Text Tool to do any text on screen in an HD sequence and put it over a colored background. Then, choose downconvert (center cut or letterbox) and view on a large Plasma (we have 50″ and 42″ Panasonic and both showed it). The “ghosting” is a very soft shadowy shape of the text above and below it… It will NOT show up on the computer monitors…and is not clearly seen on smaller monitors.
It took a while for AJA Tech Support to see it…we went around and around. He at first didn’t see it as he told me he was using smaller CRTs to test. He then got with a supervisor and checked it on a large monitor and called me back saying “yes, we see it now.” So, again, it’s real and not something I’m goofing up on my end. 🙂
I really do NOT want to make this sound negative against AJA, though I hope we hear something soon about a fix for this. They were great on the phone support and called me back several times that day and kept at it until they saw what I was seeing.
Thx.
Kevin
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[Kevin Wild] “To recreate, just use either Boris or Text Tool to do any text on screen in an HD sequence and put it over a colored background. Then, choose downconvert (center cut or letterbox) and view on a large Plasma (we have 50″ and 42” Panasonic and both showed it). The “ghosting” is a very soft shadowy shape of the text above and below it… It will NOT show up on the computer monitors…and is not clearly seen on smaller monitors.”
OK
. you are looking at SD interlaced content on a HD plasma display. OF course it looks like mush- you are over rezing the content- virtually ALL SD text looks bad on plasma displays IMHO. you are letting the Plasma uprez your content to its native screen size.Sorry –This is not a Kona Problem, this is operator error the native rez on your plasma is most likely 1280 x 768 and you are enlarging 720 x 486 content to fill it. You did not think of that as an issue?
What does it look like on a Broadcast monitor?? Plasmas should NEVER be used to judge SD content- they were not really made for that use.
gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows -
Gary, with all due respect, if the makers of the product say it is a bug, it is a bug.
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“this is operator error the native rez on your plasma is most likely 1280 x 768 and you are enlarging 720 x 486 content to fill it. You did not think of that as an issue?”
And yes, this is a little offensive after I have over and over explained my process and how AJA agree with me. This was not a case of “operator error.” I covered my bases by spending 1/2 a day with tech support…thanks, though.
KW
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kevin
Sorry, however it was not until your post today that you mentioned that you were only seeing the issue on a plasma display- https://forums.creativecow.net/readpost/98/866477
You said AJA had to look at it on a plasma to see the issue, but only today did you mention that you were indeed looking at the plasma for your only ( my assumption) monitor.
Your plasma display is uprezing your incoming SD footage to meet its native resolution, guessing that you are on a 1280 x768 plasma (you have never mentioned what rez it is) that means that your SD content is being enlarged vertically about 0 .675%, not exactly a round number.
I firmly believe that is what you are seeing, the enlargement being done internally (of which you have no control) by the display itself, not the signal coming from your Kona Card.
gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows -
No, it is worse than that. And it is visible on our 20″ CRT also, though not as easily seen.
It is difficult to describe a visual problem, so I don’t think you are correctly “getting” what it is. That is why I sent a picture to AJA and the immediately said “that is not right” even for a plasma that is uprezzing.
Gary, I’d rather not keep this thread alive to only prove that this was not operator error or some ignorance on my part, so I’m done. In calling AJA, I thought I did that already. Hopefully AJA will chime in or let us know soon what the deal is. If I hear anything from them, I will post it. Thanks for trying…
Kevin
http://www.drawbridge.tv -
Gary,
I see this too on with my Kona 2 on a CRT broadcast monitor.
I dont think what’s going on is what you think it is. It may not be affecting everyone, but it is real.
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