x265 HDR 参数计算方法

2024-08-15
作者 ted423
~3.76K 字
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HDR 压制参数为 --master-display "G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(10000000,1)" --max-cll=1000,400

首先，不同的色彩空间有不同的G B R WP 数据

通常，不同的片会有不同的L 数据以及 max-cll

Mediainfo范例

BT.2020 Olympus Has Fallen 2013

Color range : Limited
Color primaries : BT.2020
Transfer characteristics : PQ
Matrix coefficients : BT.2020 non-constant
Mastering display color primaries : BT.2020
Mastering display luminance : min: 0.0001 cd/m2, max: 1000 cd/m2
Maximum Content Light Level : 891 cd/m2
Maximum Frame-Average Light Level : 428 cd/m2
Original source medium : Blu-ray

Display P3 会比较多

Color range                 : Limited
Color primaries             : BT.2020
Transfer characteristics    : PQ
Matrix coefficients         : BT.2020 non-constant
Mastering display color pri : Display P3
Mastering display luminance : min: 0.0001 cd/m2, max: 1000 cd/m2
Maximum Content Light Level : 479 cd/m2
Maximum Frame-Average Light : 464 cd/m2

G B R WP 数据看Mediainfo里的Mastering display color pri

Display P3
--master-display "G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)"
BT.2020
--master-display "G(8500,39850)B(6550,2300)R(35400,14600)WP(15635,16450)"

Venom 2018 movie mediainfo :

Mastering display luminance : min: 0.0050 cd/m2, max: 4000 cd/m2
Maximum Content Light Level : 3903 cd/m2
Maximum Frame-Average Light Level : 1076 cd/m2

In this case master-display=G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(40000000,50) and max-cll=3903,1076

About Maximum Content Light Level and Maximum Frame-Average Light Level … If those not present -> max-cll=0,0

测试用临时Code

前置参数

DoVi P8压制

请注意你可能需要自己修改RPU的路径

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