https://bugs.kde.org/show_bug.cgi?id=492729

            Bug ID: 492729
           Summary: Normalize (2 pass) causes Kdenlive to freeze-up
    Classification: Applications
           Product: kdenlive
           Version: 24.08.0
          Platform: Ubuntu
                OS: Linux
            Status: REPORTED
          Severity: crash
          Priority: NOR
         Component: Effects & Transitions
          Assignee: j...@kdenlive.org
          Reporter: turtle.e...@gmail.com
  Target Milestone: ---

SUMMARY
Using "Normalize (2 pass)" on any audio track causes kdenlive to "freeze," i.e.
it is unrespoinsive. The close button doesn't work. I have to do a "kill -9" on
the process to kill the program. Nothing seems to be lost after restarting, but
Normalize (2 pass) always causes kdenlive to freeze.

Initially, it looks like it is working as the progress bar goes all the way
across. But it then continues to say, "Abort processing." When clicking on
"Abort processing," kdenlive does not respond to anything.

STEPS TO REPRODUCE
1. Put Normalize (2 pass) in an audio clip on the timeline
2. Click on Analyze
3. After the progress bar is full, and nothing happens for over a minute, press
"Abort Processing."

OBSERVED RESULT
* kdenlive is now unresponsive and can't be killed with the GUI or window
manager.
* kill -9 needs to be used to kill the application.
* When restarting, nothing is lost, but Normalize (2 pass) always fails when
trying again.

EXPECTED RESULT
* Expected normalize to finish and for the application to not freeze.

SOFTWARE/OS VERSIONS
Kdenlive: 24.08.0
Package Type: Flatpak
MLT: 7.27.0
Qt: 6.7.2 (built against 6.7.2 x86_64-little_endian-lp64)
Frameworks: 6.5.0
System: KDE Flatpak runtime
Kernel: linux 5.3.0-7648-generic
CPU: x86_64
Windowing System: xcb
GPU: NVIDIA Corporation/GeForce GTX 670MX/PCIe/SSE2
Movit (GPU): disabled
Track Compositing: qtblend

ADDITIONAL INFORMATION
Using appimage Kdenlive: 23.04.3, Normalize (2 pass) works as expected.
This version works:
Kdenlive: 23.04.3
Package Type: appimage
MLT: 7.17.0
Qt: 5.15.10 (built against 5.15.10 x86_64-little_endian-lp64)
Frameworks: 5.108.0
System: Ubuntu 18.04.6 LTS
Kernel: linux 5.3.0-7648-generic
CPU: x86_64
Windowing System: xcb
Movit (GPU): disabled
Track Compositing: frei0r.cairoblend

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