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Old 25th July 2020, 18:15   #32  |  Link
BobbyBoberton
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Join Date: Jul 2018
Posts: 24
Quote:
Originally Posted by -QfG- View Post
Code:
Color primaries : BT.2020 
Transfer characteristics : PQ 
Matrix coefficients : BT.2020 non-constant 
Mastering display color primaries : Display P3 
Mastering display luminance : min: 0.0050 cd/m2, max: 4000 cd/m2 
Maximum Content Light Level : 5847 cd/m2 
Maximum Frame-Average Light Level : 1355 cd/m2
The x265 commandline for this:

Code:
--hdr --output-depth 10 --hdr-opt --max-cll "5847,1355" --master-display "G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(40000000,50)"
Thanks but I did say I know that that would be the command, the 5847 cd/m^(2) = 5847 nits and the 'best' consumer HDR displays are 1000 cd/m^(2) or 1000 nits peak brightness so wouldn't having the Frame-Average Light Level = 1355 cd/m^(2) / nits mean that the image is super bright and washed out all the time? I mean that's 100% brightness on average from what I understand about HDR and nits output. I know how to change the command line but i am asking if that make sense to use those settings or does the 1000,400 level make more sense for not professional grade video equipment. (Its "pro-sumer" stuff I have but its not professional grade AV gear).

EDIT: Also, I forgot to ask about why you didn't address the what if I encode a source with P3 master display primaries when it was originally encoded with BT2020 primaries or vice versa? Would this be barely noticeable, very noticeable, dramatically noticeable or produce an indecipherable picture in HDR mode?

Thanks

Last edited by BobbyBoberton; 25th July 2020 at 20:08. Reason: forgot a question
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