Probably huge bug in VEGAS... or not

arkadiusz-buchala wrote on 5/4/2017, 4:05 PM

I have a problem with banding in Vegas, it is becoming more visible when using noise reduction f.e. neat video. It's not neat video related problem, because if you add f.e. gaussian blur you will get te same visible banding in the picture.

Vegas is behaving like the output is being set to 8-bit, but the pixel format is set for 32-bit, so there should be no banding. It is not a problem with video clip because file is from URSA mini 4K ProRes LT 422 10 bit. And I used it in Davinci Resolve. I also tried to denoise it in Davinci, and the image is free of banding so the problem lies in VEGAS I guess.

I get the same problem on my second PC. It is a HP z600 Xeon x5650 x2, 24 GB RAM, GTX 660, Win 10 x64, VEGAS PRO 14 252 build.

Here are video clips:

https://drive.google.com/file/d/0B5JPx1tzC-xJa3UtWTZZRFpZYVU/view?usp=sharing - file rendered in VEGAS, ProRes LT

https://drive.google.com/file/d/0B5JPx1tzC-xJSlVCeDJpSDV4MGc/view?usp=sharing - file rendered in Davinci Resolve

https://drive.google.com/file/d/0B5JPx1tzC-xJZHc3QjJzSTZrWVE/view?usp=sharing - raw footage

I wonder if it's only my problem or not. If not then this is a huge bug in Vegas.

Comments

NickHope wrote on 5/4/2017, 9:58 PM

I tried a default gaussian blur on your raw footage in a 32-bit floating point project and I don't see that horrible banding. Also didn't see them in a ProRes 422LT render from VP14. But then my system is only capable of monitoring in 8-bit, and I didn't correct the colours. How did you correct the colours?

arkadiusz-buchala wrote on 5/5/2017, 12:12 AM

Nick, I've found the problem.

I thought that specific LUT's were causing a problem, but then I tried to use VISION COLOR LUT plugin instead of IGNITE LUT plugin and the banding disappeared... Hitfilm's website says that IGNITE plugins should deliver 32-bit pixel depth. It's not working at least for me.

Thank you Nick!

NickHope wrote on 5/5/2017, 1:40 AM

Thanks for letting us know the solution. Please tell Hitfilm!

arkadiusz-buchala wrote on 5/5/2017, 3:10 AM

I already did this :)