https://bugs.kde.org/show_bug.cgi?id=442161

            Bug ID: 442161
           Summary: kdenlive crashes using audio effects due Invalid or
                    failed Parsing
           Product: kdenlive
           Version: 21.08.0
          Platform: Snap
                OS: Linux
            Status: REPORTED
          Severity: critical
          Priority: NOR
         Component: Effects & Transitions
          Assignee: vpi...@kde.org
          Reporter: todo.ciencia.y.electron...@gmail.com
  Target Milestone: ---

Created attachment 141379
  --> https://bugs.kde.org/attachment.cgi?id=141379&action=edit
Error log from kdenlive (running on Debian 11 terminal)

SUMMARY
Snap version of kdenlive on Debian 11 (Clean installation of system and snap)
closes abruptly when modifying parameters of audio effects (Discovered with
effect "sox_Echo").

When run through terminal, you can get a log of various parsing errors from the
splash screen startup.

recreating the failure results in similar but final records that toggle between
invalid / aborted parsing, invalid context, or double parameter

STEPS TO REPRODUCE
1. start kdenlive from terminal (this will show the semi log)
2. create a project 1 video + audio
3. Add sox_echo effect to audio, set the delay parammeter to the minimum or in
gradual decrements up to 80 [eventually the closer it gets to the minimum or
immediately the kdenlive is placed it will close].

OBSERVED RESULT
The terminal will return a series of registers where you can see various error
messages by grouping together with some critical error messages, invalid syntax
or parsing etc. until abrupt shutdown, or code aborted

the project is recoverable when opening again, but as long as the modification
of the effect is repeated, the failure will be repeated (it is recommended to
open again with the terminal to register or notice changes in the error lines)

EXPECTED RESULT
Apparently there is some error in the syntax of the code from the start lines
of the program, which lead to secondary failures in various components such as
filters and effects and the title generator,

-Among the errors, there seems to be one related to ALSA. (I don't know if it's
the culprit or if it's a debian 11 bug)

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION

I will attach a text document with the error messages returned by the method of
running through the terminal (There is no difference between running from icon
and terminal, the error is repeatable).
-The system is clean (less than a week of new installation and kdenlive with
less than 2 hours so I doubt it is an error in the system files)

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