stair stepping / Alaising-Effect on 4K videoinput

Bodo

actually if I zoom close and it is real in focus i see the stair stepping-effect even in 1080p....

DusX

can you provide screen grabs to show what you are seeing?

Fred

Check you are actually getting proper 4k from your HDMI. The GH4 can output scaled resolutions over HDMI. Also check it with a 4k monitor to see if you have the same issues, also try make a recording with the blackmagic software and check to see if the recording has the same issues.

Try these instructions

https://www.lensrentals.com/pr...

Bodo

@fred - Thank you very much I will try this!

Bodo

@fred and DusX - attached a screenshot 1. Isadora capture and 2. media express recording under same conditions - there is the aliasing effect with Isadora and not with media express???

Bodo

@dusx

hi dusx - I did a screenshot of the effect I mean and a recording with media express (which does not has this effect) - any idea why Isadora make this aliasing effect with the incoming stream and media express not?

thank Bodo

m_theater

@bodo

i think that the internal scaling isn't working for you.

could you make a screenshot of the actual stage in 1920x1080, the floating preview window is not a good reference.

I think it would be worth to check how your 4k footage is presented on a a 4 screen, if you have non around you could emulate one with your quadro.

and check the difference in the screenshots.

from my point of view: if izzy is working correctly there shall be no influence apart from the yuv -> rgb transformation in the picture if you have a 4k camera / 4k processing / 4k screen.

if that is working correctly, perhaps you need a custom shader for a proper scaling

best clemens

DillTheKraut

@bodo

did you check your default resolution settings in preferences?

Bodo

@dillthekraut - it is set to HD - should be 4k?

Bodo

@m_theater thanx for reply - I will check this when I`am back in the studio we have a 4k Monitor there...