[kdenlive] [Bug 471555] New: Preview not playing, hangs

[Jim Henderson]

https://bugs.kde.org/show_bug.cgi?id=471555

            Bug ID: 471555
           Summary: Preview not playing, hangs
    Classification: Applications
           Product: kdenlive
           Version: 23.04.2
          Platform: macOS (DMG)
                OS: macOS
            Status: REPORTED
          Keywords: usability
          Severity: crash
          Priority: NOR
         Component: Video Display & Export
          Assignee: jb at kdenlive.org
          Reporter: jimh at sydney.dialix.com.au
  Target Milestone: ---

SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug
symbols.
See
https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***


STEPS TO REPRODUCE
1. Editing videos of a speaker, with slides, nearly an hour, many cuts, using
transform and alpha mask effects.
2. When I go away to do other things and come back, quite often the preview
won't play. (The play icon changes to the pause icon, but the video preview
doesn't play.)
3. Open the Kdenlive menu and select Quit Kdenlive.

OBSERVED RESULT
Program doesn't quit, and after a short time the cursor changes to Waiting
circle going round and round.
I can open Application Manager, select kdenlive (which is shown as Not
Responding) and Force Quit. I'll attach a file of the report that goes to Apple

EXPECTED RESULT
The video should play in the Preview window pane, and when I try to quit the
application it should quit.

SOFTWARE/OS VERSIONS
macOS: Ventura 13.4.1

ADDITIONAL INFORMATION

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