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Possible HLG HDR bug in JRVR
bogdanbz:
I have "Convert HLG HDR to HDR10 for pass through" in JRVR settings.
However, when I play this file fragment which is supposed to be a HLG stream, JRVR plays it back as SDR: download link.
MediaInfo says this about it:
--- Code: ---Color primaries : BT.2020
Transfer characteristics : BT.2020 (10-bit)
transfer_characteristics_Original : HLG / BT.2020 (10-bit)
Matrix coefficients : BT.2020 non-constant
--- End code ---
jmone:
Edit: as I was typing Hendrik replied...... The file does not play for me either as HLG but others do.
I checked MC's playback of your file with a known HLG (the one of the right). I see yours is identified by JRVR as 2020 but with a BT.1886 transfer not HLG - note: BT.1886 is a std the BBC uses, and it is similar (but not the same) as Rec709 + 2.4 gamma. So I chucked it into Davinci Resolve and it was not automatically identified as HLG (or anything). So basically, I'm not much help in working out what this clip really is and if it is MediaInfo or JRVR that is miss identifying it..... but I'm sure Hendrik will.
Hendrik:
I see what the problem is. The information in that file is contradicting itself. The container says SDR, and the video says HLG. And the container wins, typically.
jmone:
FWIW, I used MKVToolNix GUI to change "Transfer Characteristics" from "14" to "18" and the file now plays correctly.
bogdanbz:
Thank you for figuring this out.
I did not realize MediaInfo does not show container settings. And I had no idea what the numerical values for Transfer characteristics mean.
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