Bug 512561

Summary: Project crashes on open in version 25.08.3 but works on version 25.04.3
Product: [Applications] kdenlive Reporter: a a <hlaaftana>
Component: Timeline & EditingAssignee: Jean-Baptiste Mardelle <jb>
Status: RESOLVED DUPLICATE    
Severity: crash CC: berndmj
Priority: NOR Keywords: triaged
Version First Reported In: 25.08.3   
Target Milestone: ---   
Platform: Microsoft Windows   
OS: Microsoft Windows   
Latest Commit: Version Fixed/Implemented In: 25.12.0
Sentry Crash Report:
Attachments: Crashing project file

Description a a 2025-11-24 15:47:01 UTC
Created attachment 187125 [details]
Crashing project file

SUMMARY

40 minute project with 1 video track and 4 audio tracks, most of it edited down from a single 4 hour video, which was made in 25.08.3, crashes when opening when "Building sequences" is at 50%. However, it loads when downgrading to version 25.04.3, despite not being made in that version. After looking online for similar crashes on the latest version, I found that downgrading the version worked for a lot of people including bug report 511661, and it worked for me as well, even though I didn't make the project in an older version.

A possible problem with the project is that a bunch of cut audio items have individual effects (623) since this is my first time using the program, there are also 2 audio tracks with effects. The effects are normalize, volume, and noise suppressor for voice.

The project is attached but the files are not, one could probably replace them with the same length of still black video and silence, I doubt the actual video data is relevant. The first video is 2 minutes 7 seconds long (00:02:07:23) with 1 audio track, the second video is 4 hours long (04:36:56:02) with 6 audio tracks, but only the first 3 are used. There is also a 6 second audio capture (00:00:06:15).

STEPS TO REPRODUCE
1. Download the project
2. Try opening it, maybe with the video/audio files substituted
3. Wait for it to load

OBSERVED RESULT

Crashes at "building sequences" at 50%

EXPECTED RESULT

Project loads, as it does on version 25.04.3

SOFTWARE/OS VERSIONS
Windows: 11
KDE Frameworks Version: 6.19.0
Qt Version: 6.9.2

ADDITIONAL INFORMATION
Comment 1 Bernd 2025-11-24 16:18:13 UTC
I can confirm that the attached project file causes 25.08 (Flatpak and appimage) and even the latest nightly build to crash.
Comment 2 Jean-Baptiste Mardelle 2025-11-24 17:27:42 UTC
Thanks for your report. There was a regression in 25.08.x where opening projects that had an audio track in monitor mode crashes on open.
This is fixed in the upcoming 25.12.0. As a workaround, you can open the .kdenlive project file and replace line 134:

<property name="kdenlive:audio_rec">1</property>

with:

<property name="kdenlive:audio_rec">0</property>

Your project should open fine after this.

*** This bug has been marked as a duplicate of bug 512319 ***
Comment 3 a a 2025-11-24 19:00:20 UTC
(In reply to Jean-Baptiste Mardelle from comment #2)
> Thanks for your report. There was a regression in 25.08.x where opening
> projects that had an audio track in monitor mode crashes on open.
> This is fixed in the upcoming 25.12.0. As a workaround, you can open the
> .kdenlive project file and replace line 134:
> 
> <property name="kdenlive:audio_rec">1</property>
> 
> with:
> 
> <property name="kdenlive:audio_rec">0</property>
> 
> Your project should open fine after this.
> 
> *** This bug has been marked as a duplicate of bug 512319 ***

Thanks, can confirm this works.