Bug 469905

Summary: The blur effect works properly on the preview but is applied wrong on the export.
Product: [Applications] kdenlive Reporter: Ademar Oliveira <ademar111190>
Component: Rendering & ExportAssignee: Jean-Baptiste Mardelle <jb>
Status: REPORTED ---    
Severity: normal    
Priority: NOR    
Version: 23.04.1   
Target Milestone: ---   
Platform: macOS (DMG)   
OS: macOS   
Latest Commit: Version Fixed In:
Sentry Crash Report:
Attachments: the four files

Description Ademar Oliveira 2023-05-17 17:37:15 UTC
Created attachment 159039 [details]
the four files

SUMMARY

I create a rectangle to blur a video piece, which works as expected in the preview but applies differently when rendering to a file.

STEPS TO REPRODUCE
1. Duplicate the video track
2. At the upper track, adds "Alpha shapes (mask)"
3. Create any rectangle you want
4. At the upper track, adds "Gaussian blur"
5. set sigma to 20

OBSERVED RESULT
The preview blurs the rectangle, but the rendered file doesn't.

EXPECTED RESULT
Both should apply the effect in the same way.

SOFTWARE/OS VERSIONS
macOS: 12.6.5

ADDITIONAL INFORMATION

In the attachment, I'm adding a zip file containing the following:
- A record of kdenlive preview where you can see the effect working as intended
- The rendered file where you can see the effect is present, but in a much different way
- The original video without effect and the .kdenlive project file in case you want to reproduce it.