Bug 455053

Summary:	Vectorscope image error on mask usage
Product:	[Applications] kdenlive	Reporter:	thaylor.peter
Component:	Rendering & Export	Assignee:	Jean-Baptiste Mardelle <jb>
Status:	RESOLVED FIXED
Severity:	normal	CC:	fritzibaby
Priority:	NOR	Flags:	fritzibaby: Brainstorm+
Version First Reported In:	22.04.1
Target Milestone:	---
Platform:	Microsoft Windows
OS:	Microsoft Windows
Latest Commit:	https://invent.kde.org/multimedia/kdenlive/commit/e0f68346d015180a0ccce2fd740bb3598f359a4a	Version Fixed/Implemented In:	22.08
Sentry Crash Report:

Description thaylor.peter 2022-06-08 22:14:33 UTC

SUMMARY
If I use a mask (rotoscoping) on a track, the vectorscope image will be wrong. 


STEPS TO REPRODUCE
1. Put any video having people in it
2. Mask out a portion of the skin (only skin should be visible)
3. Check that the vectorscope has nothing on the skintone line, rather in the direct opposite part of the circle.

OBSERVED RESULT
Vectorscope image is missleading.

EXPECTED RESULT
Skin tones should be on the skintone line.

SOFTWARE/OS VERSIONS
Windows: 11 21H2
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION

Comment 1 emohr 2022-07-20 11:53:36 UTC

Thank you for reporting. I can confirm this issue following your steps. 

When you use the rotoscope effect, no matter on track or on the clip the skin tone in the vectorscope is in the blue region not on the skin region (as you stated).

Comment 2 emohr 2022-07-20 12:24:52 UTC

See Bug 453149 as well.