Bug 509056

Summary:	Rotation of a transition effects independent composition
Product:	[Applications] kdenlive	Reporter:	Bernhard <bf>
Component:	Timeline & Editing	Assignee:	Jean-Baptiste Mardelle <jb>
Status:	CONFIRMED ---
Severity:	normal	CC:	berndmj
Priority:	NOR	Keywords:	triaged
Version First Reported In:	25.12.1
Target Milestone:	---
Platform:	Kubuntu
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Bernhard 2025-09-03 07:32:47 UTC

SUMMARY
If I add a transition to a clip and rotate the frame, independent compositions which are earlier in the timeline get rotated.

STEPS TO REPRODUCE
1.  Create 3 clips in 3 video tracks above each other and composite each to the next one (so a stack of 3 clips composited together).
2.  Add a clip later in the timeline and add the transition effect to it.
3.  Rotate this later clip with the transition using the drag handle in the project monitor.

OBSERVED RESULT
If you go back in the timeline you will see that each composition got rotated as well.

EXPECTED RESULT
The compositions should not rotate.

SOFTWARE/OS VERSIONS
Operating System: Kubuntu 25.04
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.3

ADDITIONAL INFORMATION
This happens in the official app image but I also use a self-compiled version from the Git repo using the 25.08 release branch.
This is really disturbing as it causes seemingly random side effects to your video.
Here is a video which shows the bevavior:
https://drive.google.com/drive/folders/1J9_lPSNO0adL0729QKOEejAqB5UyIRRu?usp=drive_link

Comment 1 Bernd 2025-09-03 18:04:27 UTC

I can confirm this behavior.

If you use Transform effects on the three clips instead of Composite and Transform, the Transform effect on the other clip does not interfere with the three clips. But as soon a Composite and Transform composition is added to any of the three stacked clips, an change of the Transform effect in another one is somehow copied to the compositions.

Comment 2 Bernhard 2025-10-25 11:23:24 UTC

Any progress with this?

Comment 3 Bernhard 2026-01-10 16:57:46 UTC

I just upgraded the reported version since this bug still persists in 25.12.1.