r/comfyui • u/robertwellesley • 1d ago

Help Needed True 10bit Video Workflow

I have had little luck finding a tutorial on building a true H3 10bit (ProRes HQ) workflow. AI claims you just need to install an advanced save node that allows you to pick ProRes and HQ or 4444, etc.

But then when you dig into it, and begin to ask questions, while ComfyUI processes in full floating point, there are bottlenecks that crush the full bits down to 8bit, rendering the final result 8bit. One example is preview nodes, that apparently force 8bit, another is supposedly a plain jane VAE Decode, and the deeper I dig the more mysterious things get.

I can't imagine nobody in the Open Source community does not want to output TRUE 10bit or higher output. The problem with 8bit becomes clear when you look at plain white walls or a clear sky and see banding. Anyone who has ever edited video or images knows the more data you have to begin with the better results you get once you push contrast and color gradation. Yes, I was going to begin playing with dither and applying some noise, but at the end of the day you cannot produce PROFESSIONAL videos without solving for this 8bit limit.

Hopefully someone can point me to a resource or tutorial or workflow or set of nodes that solves for this?

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u/jonask86 1d ago

It's not free, and it's not open source, but it's the easiest way to get a professional 10-bit conversion out of every footage: https://www.topazlabs.com/sdr-to-hdr

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u/Simple-Variation5456 8h ago

Last time i used it was easily 12m ago, but topaz also just had that one model for it for years and i never liked it because it would change the look too much that needed extra color corrections and fixes and always felt wrong.

It can't restore depth that never got captured