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Old 3rd April 2018, 20:23   #50046  |  Link
mparade
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Join Date: Nov 2013
Posts: 577
Quote:
Originally Posted by sneaker_ger View Post
You have set matrix coefficients and color primaries to BT.709 (1 & 1) and left transfer characteristics undefined (2). Usually for HDR those are set to bt2020nc (9), bt2020 (9) and smpte2084 (16) respectively. (I haven't checked the actual content of your sample, only the flags.)
http://x265.readthedocs.io/en/defaul...mation-options
Thank you very much for the help. All the flags are set by StaxRip automatically. I did not touch them not to make any mess. According to the author of the script:

Quote:
# Convert Bluray Video (BT709) to 10bit 400nits (MaxFALL) High Dynamic Range Video.
# In some scenes, HDR output of this script saves as much as 50% bitrate in x265 CRF mode and doubles the quality in x265 2pass CBR mode.
# You must have a HDR compliant TV to play the output file.
# Script is 100% compliant with current HDR standards and has been tested extensively on HDR compliant TVs.
# Do NOT modify the script. Input and output are guaranteed to look 100% identical with default script settings. All x265 HDR switches are automatically set by Staxrip.
# Current UHD Bluray and HDR TV specifications only support exactly 400nits MaxFALL. Not more, not less. Standards will not change for many years.
# Do NOT change MaxFALL. Hardware players and TVs will not correct/scale it for you. White level and brightness will be off.
# MaxFALL and MaxCLL are both equal to 400nits. You can not independently set them.
# Do not change the gamma extraction to a value other than 2.2 specified in the script. It is NOT related to the gamma correction values used by the studios when mastering Bluray video. It is NOT related to the gamma settings of your monitor/TV either.
# We are extracting 2.2 gamma only because the exact same amount will be added back by SMPTE 2084. Not more, not less.
# SMPTE 2084 is a specialized HDR perceptual quantizer that already has built in gamma encoding that is exactly equivalent to a 2.2 pure gamma function.
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