I’m noticing extreme banding in the image output through the new DeckLink interface.
This is the image in the GUI (looks good, is ProRes4444):
But here’s the image on my color calibrated reference display, which is receiving an SDI signal via DeckLink Mini Monitor 4K:
There’s lots of banding and macro blocking on her skin.
The session is set to 16 float in Si.
I don’t see any settings to control the DeckLink output in Si aside from framerate and resolution.
If I had to guess, Si is exporting an 8-bit signal to the DeckLink?
This same image looks good on my DeckLink out in Resolve.
The issue is a little more easy to see when the image is log:
On the subject of DeckLink output…
The viewer transform settings don’t seem to apply to the DeckLink image. We don’t want to see a correctly transformed image in the GUI but be showing clients a log (or worse, linear) image…
The same transform should apply equally to the DeckLink.
I thought I’d work around this by putting an Arri LUT on the OCIO LUT node. However, that node seems really slow. Playback of HD footage on a fast machine with an RTX 3090 drops to almost half.
Applying a LUT through the Si native viewer is quite fast, so the easiest thing would be to reflect that LUT in the DeckLink output, in my opinion.