https://bugs.kde.org/show_bug.cgi?id=513675
Bug ID: 513675
Summary: regression: rotoscoping (mask) does not function
Classification: Applications
Product: kdenlive
Version First 25.08.2
Reported In:
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Video Effects & Transitions
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
Rotoscoping simply does nothing. Last known working date was 2024-12-25. Opened
my old project and found stuff broken.
STEPS TO REPRODUCE
1. for simple testing, add a colour clip, white background, add to timeline
2. apply Rotoscoping (Mask), mode alpha, alpha operation subtract, invert
false, feather width 0, feathering passes 1; in the project monitor, select
some random portion
OBSERVED RESULT
The selected portion should become transparent.
EXPECTED RESULT
Observe that nothing happens after the region is made.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Ultramarine Linux 43
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.21.0
Qt Version: 6.10.1
ADDITIONAL INFORMATION
I am not so sure if some changes were applied to the rotoscoping effect during
kdenlive updates, so here's what I've found inside the .kdenlive file for
reference (though I don't think this will help):
<filter id="filter15">
<property name="filter">rotoscoping</property>
<property name="mlt_service">mask_start</property>
<property name="kdenlive_id">mask_start-rotoscoping</property>
<property name="filter.spline"/>
<property name="filter.mode">alpha</property>
<property name="filter.alpha_operation">clear</property>
<property name="filter.invert">0</property>
<property name="filter.feather">0</property>
<property name="filter.feather_passes">1</property>
<property name="kdenlive:collapsed">0</property>
</filter>
some property tags for filter.spline also contain pretty large json content,
just to make things clear.
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