Bug 498535

Summary: Starting kdenlive-24.12.0-x86_64.AppImage cannot create video preview window and segfaults
Product: [Applications] kdenlive Reporter: dreamer <bugs.kde.org>
Component: Setup & InstallationAssignee: Jean-Baptiste Mardelle <jb>
Status: REPORTED ---    
Severity: crash CC: fritzibaby
Priority: NOR Keywords: triaged
Version First Reported In: 24.12.0   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description dreamer 2025-01-11 17:04:52 UTC 
SUMMARY

On the latest Appimage, version 24.12.0-x86_64 I'm not able to start the program as I get the following error:

Could not create video preview window.
There is something wrong with your Kdenlive install or your driver settings, please fix it.

Two instances of this error pop up immediately and after clicking one away the program closes with a Segmentation fault.

STEPS TO REPRODUCE
1.  Download latest Appimage
2.  Set execute bit
3.  Start Appimage

OBSERVED RESULT

Two error popups and segfault

EXPECTED RESULT

No errors and no segfault

SOFTWARE/OS VERSIONS
Linux: Debian 12 x86_64

ADDITIONAL INFORMATION

I have reset the `.config/kdenlive-appimagerc` settings file and still get the same result.

This was in an attempt to confirm https://bugs.kde.org/show_bug.cgi?id=464181 but am not able to because of this bug.
Comment 1 emohr 2025-01-12 15:52:25 UTC 
Beside deleting: "~/.config/kdenlive-appimagerc"
Delete "~/.config/kdenliverc" as well

More details see here: https://docs.kdenlive.org/en/getting_started/installation.html#configuration-information
Comment 2 dreamer 2025-01-12 16:00:50 UTC 
This leads to the same 2 error popups and subsequent segfault.
Comment 3 dreamer 2025-01-12 16:51:35 UTC 
I noticed these lines in dmesg that might be meaningful:

[1448025.729081] AppRun.wrapped[1484417]: segfault at 0 ip 00007f3aac624240 sp 00007ffdbc5329c8 error 4 in libmlt++-7.so.7.28.0[7f3aac605000+2b000] likely on CPU 11 (core 6, socket 0)
[1448025.729098] Code: 54 24 08 48 89 34 24 ff d0 48 8b 54 24 08 48 8b 34 24 48 83 c4 18 48 89 c7 e9 9c 88 ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 <48> 8b 07 48 8d 0d e6 f8 ff ff 48 8b 40 10 48 39 c8 75 0d 48 8b 7f
Comment 4 emohr 2025-01-12 17:28:16 UTC 
The crash seems to be happened in MLT (the underlying framework of Kdenlive).

Which was the latest Kdenlive AppImage version which were running on your system?

Maybe you have to update your system with:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade
Comment 5 dreamer 2025-01-12 17:39:58 UTC 
Previously I'd use kdenlive-21.04.2-x86_64.appimage as that was the only one that could connect to alsa.
However this now also misbehaves similarly.

My Debian 12 system is currently fully up to date.
Comment 6 Bug Janitor Service 2025-01-27 03:47:06 UTC 
🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

Thank you for helping us make KDE software even better for everyone!
Comment 7 dreamer 2025-01-27 06:06:11 UTC 
I have already provided the requested information.

My Debian 12 system is fully up to date and I get this result with kdenlive AppImages.