Bug 438422

Summary: Fade In/Out effects darkens the image
Product: [Applications] kdenlive Reporter: Lucas Vinicius Hartmann <lucas.hartmann>
Component: Video Effects & TransitionsAssignee: Jean-Baptiste Mardelle <jb>
Status: REPORTED ---    
Severity: normal CC: fabianroeling, fritzibaby
Priority: NOR    
Version First Reported In: 21.04.1   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Sample

Description Lucas Vinicius Hartmann 2021-06-10 15:02:47 UTC 
SUMMARY

Fade In/Out effects, when not to/from black, still darken the image.

STEPS TO REPRODUCE
1. Create any white clip, like a title with white background.
2. Place the white clip on the timeline, on two video tracks.
3. Add fade in (or out) effect to the top clip.
4. Check a frame halfway along the fade.

OBSERVED RESULT

Frame will be gray, as a result of combined fade to black+transparent.

EXPECTED RESULT

Frame should be white, as a result of fade to transparent only.

SOFTWARE/OS VERSIONS

Linux: Fedora 34, kernel 5.12.8-300.fc34.x86_64
KDE Plasma Version: ?
KDE Frameworks Version: 5.82.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
Using rpmfusion-free package kdenlive.x86_64 21.04.1-1.fc34
Comment 1 Lucas Vinicius Hartmann 2021-06-10 15:07:01 UTC 
Created attachment 139203 [details]
Sample

Fades from white, to white, but gets gray halfway.