https://bugs.kde.org/show_bug.cgi?id=470005
Bug ID: 470005
Summary: Lift/Gamma/Gain bugs (slider resets color wheel &
color jumps around)
Classification: Applications
Product: kdenlive
Version: 23.04.1
Platform: Flatpak
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Effects & Transitions
Assignee: j...@kdenlive.org
Reporter: hyuri.pimen...@gmail.com
Target Milestone: ---
SUMMARY
Hi!
Firstly, thank you very much for the recent (23.04.1) fixes and improvements to
the Lift/Gamma/Gain effect! It's a joy to use now!
Only issue is: I'm still experiencing a bug (1) I was experiencing before, and
found a new one (2).
They seem related, so I bundled them together in this report, but let me know
if I should break them down into individual reports.
BUG #1
Sometimes the dot in the color wheel randomly jumps around when I move its
slider up and down. The color changes randomly, accordingly. I tried to
reproduce it again but it only happens sometimes. I don't know how to reproduce
it. I guess simply using it for long enough, pasting the effect onto other
clips, tweaking, adding other effects before and/or after, moving effects
around, perhaps.
I'm guessing it might have something to do with having one or — somehow — more
than one of the RGB values highlighted and being changed at the same time as
the slider when I scroll it.
STEPS TO REPRODUCE BUG #1
I can't reliably reproduce it. All I did was:
1. Add a Lift/Gamma/Gain effect to a clip
2. Move the Gain's slider up and down using Ctrl + Scroll
3. You should see the dot in the color wheel jumping around to random points
BUG #2
After shifting the colors (hue & saturation) in the color wheel, Ctrl +
Scrolling or Shift + Scrolling the luma slider to zero (0.000) resets the color
wheel. Happens to all three — Lift, Gamma or Gain. Resetting (Right Clicking)
the Lift's slider resets its color wheel as well (because Lift's default is
0.000, while Gamma and Gain's defaults are 1.000). Doesn't happen when I bring
the slider to zero by grabbing it with Left Click and moving it with the mouse.
STEPS TO REPRODUCE BUG #2'S GAMMA OR GAIN ISSUE
1. Add Lift/Gamma/Gain effect to a clip
2. Shift the colors in the Gamma or Gain's color wheels
3. Using Ctrl + Scroll, lower the Gamma or Gain's luma slider all the way down
to zero (0.000)
4. See how the color wheel has reset itself
STEPS TO REPRODUCE BUG #2'S LIFT SLIDER SCROLL ISSUE
1. Add Lift/Gamma/Gain effect to a clip
2. Shift the colors in the Lift's color wheel
3. Move the Lift's luma slider up or down any amount
4. Shift + Scroll the Lift's luma slider to zero (0.0000)
5. See how the color wheel has reset itself
STEPS TO REPRODUCE BUG #2'S LIFT SLIDER RESET ISSUE
1. Add Lift/Gamma/Gain effect to a clip
2. Shift the colors in the Lift's color wheel
3. Move the Lift's luma slider up or down any amount
4. Reset the Lift's slider by Right Clicking on it
5. See how the color wheel has reset itself as well
OBSERVED RESULT BUG #2
The color wheel resets itself when you bring the luma slider to zero (0.000).
The Lift's color wheel also resets itself when you reset the slider associated
with it.
The hue and saturation adjustments the user made are lost.
EXPECTED RESULT BUG #2
The color wheel (hue and saturation) should not be affected by its associated
luma slider.
The luma adjustment should be decoupled from the hue and saturation adjustment
so that we don't lose hue and saturation adjustments while changing luma.
SOFTWARE/OS VERSIONS
Linux / DE: Pop!_OS 22.04 / Gnome 42.5
KDE Frameworks Version: 5.106.0
Qt Version: 5.15.19
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