Bug 516040

Summary: NTSC filter ignores rotoscoped area for the "mask apply" filter.
Product: [Applications] kdenlive Reporter: xorede6147
Component: Video Effects & TransitionsAssignee: Jean-Baptiste Mardelle <jb>
Status: CONFIRMED ---    
Severity: normal CC: berndmj
Priority: NOR Keywords: triaged
Version First Reported In: 25.12.2   
Target Milestone: ---   
Platform: unspecified   
OS: All   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: I put an image of both the working filter (blur as an example) and the not working NTSC filter.

Description xorede6147 2026-02-15 14:23:47 UTC 
Created attachment 189616 [details]
I put an image of both the working filter (blur as an example) and the not working NTSC filter.

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SUMMARY
A little bit ago, the NTSC filter was added for VHS like effect thanks to frei0r.
However, it will not work with the rotoscope. It applies to the entire clip and ignore the roto mask apply filter.


STEPS TO REPRODUCE
1.  Add a clip
2.  Add the roto
3.  Use the roto to make an area
4. Add the NTSC filter
5. Add the "mask apply" filter.

OBSERVED RESULT
The entire clip boundaries is applied


EXPECTED RESULT
Only the rotoscoped area applies the effect

OPERATING SYSTEMS
I tested this with just kubuntu so far, it happens with both the AppImage and flatpak versions.

ADDITIONAL INFORMATION
I've attached two screenshots to show what I mean.