Bug 358044

Summary:	Lumakey Effect listed but does not work
Product:	[Applications] kdenlive	Reporter:	bryanworsley
Component:	Video Effects & Transitions	Assignee:	Vincent PINON <vpinon>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	jb, wegwerf-1-2-3
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	Luma key effect

Description bryanworsley 2016-01-16 00:38:09 UTC

In KdenLive 15.12.0 , Lumakey effect appears in Effects listing under Misc. Selecting the effect pulls up the slider controls (Threshold, Slope, Pre-Threshold Luma Level, Post-Threshold Luma Level) but the controls have no effect at all.  

Raised the subject on KDenLive Forum:
https://forum.kde.org/viewtopic.php?f=270&t=130518



Reproducible: Always

Steps to Reproduce:
1. Apply listed lumakey effect to clip in timeline
2. Effect controls appear 
3. Manipulate the controls and observe effect on clip in monitor

Actual Results:  
Manipulating the controls had no effect

Expected Results:  
As per the applied effect control parameters 

Not sure whether to report this as a bug or feature request. 

Whether the lumakey effect is listed "by accident" or just not implemented yet, this would be a very useful effect to have working.

Comment 1 Jean-Baptiste Mardelle 2016-01-17 20:32:20 UTC

Created attachment 96701 [details]
Luma key effect

The Lumakey effect changes the clip's alpha channel. So the see it's effect, you need a transition (like composite transition that is available in tracks) and another clip beneath.

Works in my tests (see attached screenshot)

Comment 2 bryanworsley 2016-01-18 13:55:06 UTC

Ah, OK, gotcha. Thanks for clarifying that.