Bug 475376

Summary:	Keyframes sometimes get lost with Transform tool
Product:	[Applications] kdenlive	Reporter:	rlk
Component:	Video Effects & Transitions	Assignee:	Jean-Baptiste Mardelle <jb>
Status:	RESOLVED WORKSFORME
Severity:	major	CC:	berndmj, masdrubal65
Priority:	NOR	Keywords:	triaged
Version First Reported In:	23.08.0
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description rlk 2023-10-08 15:31:02 UTC

SUMMARY
***
When editing a clip using the Transform tool, mostly when moving (translating) a keyframe, sometimes the scaling/translation components of the keyframe get lost and simultaneously all red keyframe dots on the preview vanish. This most commonly happens when using the direct entry boxes in the tool (e. g. horizontal and vertical position). I use the mousewheel to move the frame; while spinning the wheel, I observe all of the keypoints vanish. In case it matters, I always lock aspect ratio.

Undo does not restore them. If I save the project, I observe that there are no keyframes in the translation/scaling list that were inserted prior to them getting lost, but rotation components are there. If I reopen the project, the keyframes show up in the timeline, but the positions are gone. Needless to say, this results in the loss of a lot of work.

If I save the project after every keyframe edit, this does not happen. It otherwise does not happen predictably and there's no specific reproducer case. Perhaps the fact that saving the project constantly suppresses this behavior gives a clue.

Another effect that may or may not be related is that a keyframe added after this will be set to Discrete mode even though I have not to the best of my knowledge requested that.

This happens at least for the last several major versions.
***

STEPS TO REPRODUCE
1. Open kdenlive (on a new project)
2. Add a clip
3. Open the Transform effect, and start adding keyframes

OBSERVED RESULT
On occasion, all keyframes vanish

EXPECTED RESULT
Keyframes do not vanis.

SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: OpenSUSE Leap 15.5
(available in About System)
KDE Plasma Version: 5.27.8
KDE Frameworks Version: 5.11.0
Qt Version: 5.15.10

ADDITIONAL INFORMATION

Comment 1 asd 2025-11-26 23:43:39 UTC

(In reply to rlk from comment #0)
> SUMMARY
> ***
> When editing a clip using the Transform tool, mostly when moving
> (translating) a keyframe, sometimes the scaling/translation components of
> the keyframe get lost and simultaneously all red keyframe dots on the
> preview vanish.  This most commonly happens when using the direct entry
> boxes in the tool (e. g. horizontal and vertical position).  I use the
> mousewheel to move the frame; while spinning the wheel, I observe all of the
> keypoints vanish.  In case it matters, I always lock aspect ratio.
> 
> Undo does not restore them.  If I save the project, I observe that there are
> no keyframes in the translation/scaling list that were inserted prior to
> them getting lost, but rotation components are there.  If I reopen the
> project, the keyframes show up in the timeline, but the positions are gone. 
> Needless to say, this results in the loss of a lot of work.
> 
> If I save the project after every keyframe edit, this does not happen.  It
> otherwise does not happen predictably and there's no specific reproducer
> case.  Perhaps the fact that saving the project constantly suppresses this
> behavior gives a clue.
> 
> Another effect that may or may not be related is that a keyframe added after
> this will be set to Discrete mode even though I have not to the best of my
> knowledge requested that.
> 
> This happens at least for the last several major versions.
> ***
> 
> 
> STEPS TO REPRODUCE
> 1. Open kdenlive (on a new project)
> 2. Add a clip
> 3. Open the Transform effect, and start adding keyframes
> 
> OBSERVED RESULT
> On occasion, all keyframes vanish
> 
> EXPECTED RESULT
> Keyframes do not vanis.
> 
> SOFTWARE/OS VERSIONS
> Windows: 
> macOS: 
> Linux/KDE Plasma: Ubuntu Studio 24.04.3
> (available in About System)
> KDE Plasma Version: 5.27.8
> KDE Frameworks Version: 5.11.0
> Qt Version: 5.15.10
> 
> ADDITIONAL INFORMATION
Problem with graphics in my monitor.

Comment 2 Bernd 2025-12-04 15:24:42 UTC

Does this still occur with any of the 25 releases?

Comment 3 rlk 2025-12-04 15:36:49 UTC

I will have to go back and try.  I'm being very careful to save my work frequently.  Leaving in WAITINGFORINFO until I have a chance to experiment (may not be for several weeks).

Comment 4 rlk 2025-12-09 00:47:55 UTC

I was not able to reproduce it trying quickly with the current flatpak (25.08.3).  If you want, go ahead and close it not reproducible; I'll reopen it if I hit it again.

Comment 5 Bernd 2025-12-09 14:46:49 UTC

(In reply to rlk from comment #4)
> I was not able to reproduce it trying quickly with the current flatpak
> (25.08.3).  If you want, go ahead and close it not reproducible; I'll reopen
> it if I hit it again.

Thanks. Closing for now.