2018-01-27, 02:33
(2018-01-27, 00:36)scott967 Wrote:Life of Pi is actually one of the movies I have. In MediaInfo I see Colour primaries: BT.2020 so it's not the same as the sample you used. I did just try it with windows default player and I feel like I was watching it in black and white in kodi, will have to re watch it's so different. This difference might actually be partially due to the fact that I am using a wide gamut monitor on windows machine though it's not HDR.(2018-01-26, 11:22)DominicM Wrote: MediaInfo only shows it is 10 bit, is there any telltale sign to look for?I am looking at the "Life of Pi" sample linked in the Kodi Wiki sample video files. I run Mediainfo 17.12 on the file and it gives me (extracted pertinent info):
Code:Color range: Limited
Color primaries: BT.2020
Transfer characteristics: PQ
Matrix coefficients: BT.2020 non-constant
Mastering display color primaries: Display P3
Mastering display luminance: min: 0.0200 cd/m2, max: 1200 cd/m2
compare to a generic AVC "HD" result:
Code:Color range: Limited
Color primaries: BT.709
Transfer characteristics: BT.709
Matrix coefficients: BT.709
When I play "Life of Pi" on Kodi 18 180121 nightly on windows 7 I see ffmpeg is correctly decoding this info, and DXVA isn't available for it as expected so it is decoded in software. It appears on win 7 Kodi is using pixel shaders for rendering which I don't really understand shader code, but I'm guessing this is where the conversion from color space BT-2020 to BT-709 and transfer function PQ to BT.709 (which I guess is commonly referred to as Gamma 2.4) has to be done.
Edit: I installed one of Soli's 3dlut files and turned on color management for "Life of Pi" and it looks very good. Would seem to be a viable solution for showing HDR10 files on SDR (in my case cheap Samsung 1080p) displays.
scott s.
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