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Old 21st December 2022, 22:42   #6  |  Link
poisondeathray
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Join Date: Sep 2007
Posts: 5,345
Quote:
Originally Posted by groucho86 View Post
Riiight, right... So the workaround/hack in the world of ProRes is to artificially provide those ~+2bits by scaling the signal to legal range?
It's not necessarily an accurate workaround. Other values will be slightly off, not necessarily just min/max in a channel

eg. limited doesn't work here
RGB 4095,4095,0 => 12bit full YCbCr => RGB 4095,4095,4095

RGB 4095,4095,0 => 12bit limited YCbCr => RGB 4094,4095,4095

You need +2 bits if you want/need accuracy

12bit prores 4444XQ is meant for 10bit sources
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