FinalCut Pro RGB 4:4:4 not matching 4:2:2

[Gary Adcock]

[Rafael Amador] ” We should start by no using the term “444”. This belong to down-sampled or compressed formats where 4 pixels blocks are used. We should say “Full RGB 8/10b” or “Full YUV 8/10b”. But the industry had adopted “444” because is easy to understand. “

I disagree. if you change the naming of one – you would have to rename all of the data sampling designations world wide.

First 4:4:4 has nothing to do with a 4×4 pixel block-nothing and it has nothing to do with 8bit or 10bits, it is a SMPTE designation for color vs density sampling structure.

It has everything to do with defining the color vs. chroma sampling method that is used for the signal creation or transfer, 4:4:4 as a sample measurement indicates that luma and all chroma values are each measured the same number of times.

8/10 bit depth refers to the number of levels of gray in your signal – not how that color was created or measured.

“I’m limited to learning through internet and through the other’s experience (in the COW for example) and quite often is difficult for me to put together so much contradictory information that I find. I appreciate when somebody corrects me. “

I applaud you for that, but there is nothing like real world experience. Carl defined that he was a DaVinci colorist in the first post, that skill alone sets his knowledge of highend work above many of the people like yourself, since not everyone has access to a $400K hardware solution.

I urge everyone to post comments within your working knowledge and experience. The best advice comes from someone that experienced the pain and pleasure, the trials and tribulations of an issue.

I am lucky enough to have experience with the tools and technology. That is one of the reasons that I choose to post on the mostly the higher level workflows and issues, but I am very careful about not speaking beyond my knowledge. ( most of the time)

cheers

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows

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