Blackmagic Forum


https://forum.blackmagicdesign.com/

HDR P3 Broadcast preset artifact

https://forum.blackmagicdesign.com/viewtopic.php?f=21&t=136808

Page 1 of 1

HDR P3 Broadcast preset artifact

PostPosted: Thu Mar 11, 2021 11:30 am
by Michael Boissard
Hi,
I update the procedures for making HDR programs for Netflix Amazon Disney and I noticed that you must always use the custom mode of color management because Blackamgic's HDR presets generate artifacts.

Watch it on video for 30 days on :
https://www.swisstransfer.com/d/f6051f0 ... 318150af8c

PresetHDRP3Brodcast.png
Preset HDR P3 Broadcast
PresetHDRP3Brodcast.png (353.49 KiB) Viewed 549 times

Preset HDR P3 Broadcast

PresetCustom.png
Preset HDR Custom
PresetCustom.png (329.62 KiB) Viewed 549 times

Preset HDR Custom

thanks

Re: HDR P3 Broadcast preset artifact

PostPosted: Thu Mar 11, 2021 1:18 pm
by Andrew Kolakowski
Those are due to heavy math behind the hood going bad. Some overflow issue. I think this is quite typical problem. Maybe report to BM.

Re: HDR P3 Broadcast preset artifact

PostPosted: Tue Mar 16, 2021 11:33 am
by Michael Boissard
Hi
The problem is caused by resizing incorrectly with the Timeline color space in DaVinci Intermediate
If we change the Timeline color space to ST2084 no more problem.
UHD shots in an HD timeline aggravate the concern and less visible in a UHD timeline but still more in DaVinci Intermediate as in ST2084.
Degradation is more or less accentuated with "Apply resize transformation in" when using DaVinci Intermediate.
Blackamgic your turn to improve your color space.