https://bugs.kde.org/show_bug.cgi?id=415374
Bug ID: 415374
Summary: Apply LUT effect fails on grid resolution 65 and above
Product: kdenlive
Version: git-master
Platform: unspecified
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: User Interface
Assignee: j...@kdenlive.org
Reporter: lilo...@gmail.com
Target Milestone: ---
Version of Kdenlive where bug is present (downloaded as Nightly AppImage):
20.03.70-539f6b3 (it's not present in versions list for reporting, so I chosen
"git-master" as the closest). The bug appeared at least as early as in 19.04.2.
To reproduce (100% repeatability):
- Get .cube 3D LUT file with grid resolution 65 (see below on how to).
- Create a project with any builtin profile.
- Open any clip and add it to a track.
- Add "Apply LUT" effect to the clip.
- For "LUT file to apply" field, browse and select the .cube file. The LUT will
not be applied.
Grid resolution 64 and below work fine.
Note that .cube file standard defines maximum grid resolution of 256. (
https://wwwimages2.adobe.com/content/dam/acom/en/products/speedgrade/cc/pdfs/cube-lut-specification-1.0.pdf
)
To quickly get .cube file to test, install Argyll CMS and run (the path may
differ on your platform):
cd /usr/share/color/argyll/ref
collink -ia -3c -r 65 ProPhoto.icm sRGB.icm test.cube
Default (without "-r" key) and recommended resolution by Argyll is 65.
The bug is additionally complicated to realize due to bug 415373.
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