- Posts: 641
- Joined: Sun Aug 12, 2018 10:08 am
- Location: Melbourne
- Real Name: Asim Siddiqui
I'd like to preface this with a note that there are issues with both Input and Output DRT.
I've documented Input DRT issues before here: viewtopic.php?f=21&t=156192
Now, for Output DRT, there are a number of issues I've observed particularly with SDR settings...
Example 1:
Input Color Space: Any
Timeline Color Space: Rec.709 Gamma 2.2 or 2.4 or 2.6
Timeline Luminance SDR 100
Output Color Space: Rec.709 (Scene)
Input DRT: None
Output DRT: DaVinci
Result: Output of Rec.709 (Scene) resembles Rec.709 Gamma 2.4 instead - BUG
If Timeline Luminance is changed to something else, things get even more wacky even though the source is SDR and Input DRT is none - BUG
Example 2:
Input Color Space: Any
Timeline Color Space: Rec.709 (Scene)
Output Color Space: Rec.709 Gamma 2.4
Input DRT: None
Output DRT: DaVinci
Result: Output of Rec.709 Gamma 2.4 resembles Rec.709 (Scene) instead - BUG
If Timeline Luminance is changed to something else, things get even more wacky even though the source is SDR and Input DRT is none - BUG
Example 3:
Input Color Space: Any
Timeline Color Space: Rec.709 (Scene)
Output Color Space: Rec.709 Gamma 2.2 or sRGB
Input DRT: None
Output DRT: DaVinci
Result: Midtones/shadows of Rec.709 Gamma 2.2 & sRGB are crushed even more than Rec.709 (Scene) - BUG
If Timeline Luminance is changed to something else, things get even more wacky even though the source is SDR and Input DRT is none - BUG
In all cases, disabling Output DRT fixes everything.
Sample DRA attached if anyone wishes to test it out for themselves:
For reference, the expected Middle Gray values are shown in the table at the bottom of the page:
https://xtremestuff.net/where-in-the-wo ... ddle-gray/
I've documented Input DRT issues before here: viewtopic.php?f=21&t=156192
Now, for Output DRT, there are a number of issues I've observed particularly with SDR settings...
Example 1:
Input Color Space: Any
Timeline Color Space: Rec.709 Gamma 2.2 or 2.4 or 2.6
Timeline Luminance SDR 100
Output Color Space: Rec.709 (Scene)
Input DRT: None
Output DRT: DaVinci
Result: Output of Rec.709 (Scene) resembles Rec.709 Gamma 2.4 instead - BUG
If Timeline Luminance is changed to something else, things get even more wacky even though the source is SDR and Input DRT is none - BUG
Example 2:
Input Color Space: Any
Timeline Color Space: Rec.709 (Scene)
Output Color Space: Rec.709 Gamma 2.4
Input DRT: None
Output DRT: DaVinci
Result: Output of Rec.709 Gamma 2.4 resembles Rec.709 (Scene) instead - BUG
If Timeline Luminance is changed to something else, things get even more wacky even though the source is SDR and Input DRT is none - BUG
Example 3:
Input Color Space: Any
Timeline Color Space: Rec.709 (Scene)
Output Color Space: Rec.709 Gamma 2.2 or sRGB
Input DRT: None
Output DRT: DaVinci
Result: Midtones/shadows of Rec.709 Gamma 2.2 & sRGB are crushed even more than Rec.709 (Scene) - BUG
If Timeline Luminance is changed to something else, things get even more wacky even though the source is SDR and Input DRT is none - BUG
In all cases, disabling Output DRT fixes everything.
Sample DRA attached if anyone wishes to test it out for themselves:
- Output DRT Bugs.dra.zip
- (33.07 KiB) Downloaded 28 times
For reference, the expected Middle Gray values are shown in the table at the bottom of the page:
https://xtremestuff.net/where-in-the-wo ... ddle-gray/
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