Bug 505014

Summary:	Crash when creating a new gradient in the title editor
Product:	[Applications] kdenlive	Reporter:	Bernd <berndmj>
Component:	Title Clips & Subtitles	Assignee:	Jean-Baptiste Mardelle <jb>
Status:	RESOLVED FIXED
Severity:	normal
Priority:	NOR
Version First Reported In:	25.04.1
Target Milestone:	---
Platform:	Pop!_OS
OS:	Linux
Latest Commit:	https://invent.kde.org/multimedia/kdenlive/-/commit/1d60e53a3f980cb6bedf0bc516285e39799448b7	Version Fixed/Implemented In:	25.04.2
Sentry Crash Report:

Description Bernd 2025-05-30 13:49:27 UTC

SUMMARY
Creating a new gradient crashes Kdenlive.

STEPS TO REPRODUCE
1. Add a title clip, click on Edit Gradient
2. Create a new gradient (select colors and click on the + icon
3. Click on OK

OBSERVED RESULT
Kdenlive closes the Edit Gradient window but is otherwise unresponsive. Shortly afterwards an error appears saying that Kdenlive is not responding and you can either force quit or wait.

EXPECTED RESULT
No crashing and gradient is created and can be used. 

SOFTWARE/OS VERSIONS (copied from Help > Components)
Kdenlive: 25.04.1
MLT: 7.32.0
FFmpeg
KDE Frameworks: 6.13.0
Qt: Using 6.9.0 and built against 6.9.0
KDE Flatpak runtime (Xcb)
Build ABI: x86_64-little_endian-lp64
Kernel: linux 6.12.10-76061203-generic

Comment 1 Jean-Baptiste Mardelle 2025-05-30 14:04:14 UTC

I cannot reproduce. Could you open the kdenlive config file in a text editor :
$HOME/.config/kdenliverc

And paste here the [TitleGradients] section ? It should look something like this:

[TitleGradients]
Gradient=#ffffffff;#ff000000;0;100;90
Gradient 1=#ffffffff;#ff000000;0;100;90

Comment 2 Bernd 2025-05-30 16:43:55 UTC

(In reply to Jean-Baptiste Mardelle from comment #1)
> $HOME/.config/kdenliverc
I don't have that file in that location or in $HOME/.local/share/flatpak/app/org.kde.kdenlive/current/active/files/share/kdenlive/

Comment 3 Jean-Baptiste Mardelle 2025-06-01 05:31:09 UTC

Ok, for Flatpak, the config file is here:

$HOME/.var/app/org.kde.kdenlive/config/kdenlive-flatpakrc

Comment 4 Bernd 2025-06-01 15:32:25 UTC

(In reply to Jean-Baptiste Mardelle from comment #3)
> Ok, for Flatpak, the config file is here:
> 
> $HOME/.var/app/org.kde.kdenlive/config/kdenlive-flatpakrc

[TitleGradients]
Gradient 1=

[TitleWidget]

Looks like something is missing ...

Comment 5 Jean-Baptiste Mardelle 2025-06-01 16:14:08 UTC

Git commit 1d60e53a3f980cb6bedf0bc516285e39799448b7 by Jean-Baptiste Mardelle.
Committed on 01/06/2025 at 16:13.
Pushed by mardelle into branch 'release/25.04'.

Fix empty gradient in config causes crash
FIXED-IN: 25.04.2

M  +3    -0    src/titler/gradientwidget.cpp
M  +8    -3    src/titler/titlewidget.cpp

https://invent.kde.org/multimedia/kdenlive/-/commit/1d60e53a3f980cb6bedf0bc516285e39799448b7