[MacPorts] #39505: kdenlive fails to start

[MacPorts]

#39505: kdenlive fails to start
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  Reporter:  macports@…  |      Owner:  dan@…
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.1.3
Resolution:              |   Keywords:
      Port:  kdenlive    |
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Comment (by dan@…):

 This appears to be a bug in gavl or the way frei0r is compiled against
 gavl. A frei0r plugin is calling gavl_video_scaler_create(), which takes
 no options, and this function calls gavl_video_options_set_defaults()
 where it is crashing.

 3 frei0r plugins (out of many) use gavl, and only one of those is used by
 Kdenlive, but it is not essential. I can change frei0r-plugins to make it
 not dependent upon gavl, but currently its configure script will enable
 gavl plugins if gavl is installed. I have to make a patch to
 properly/fully enable/disable the gavl dependency.

 In the meantime, you can work around the problem by simply forcing to
 uninstall gavl if you have not installed anything else that needs it: sudo
 port uninstall -f gavl. 'port dependents gavl' will tell you what other
 packages are using gavl. This works OK because only 1 frei0r plugin will
 fail to load in Kdenlive due to the missing gavl dependency: Crop, Scale
 and Position. But there are also Crop and Pan and Zoom effects in Kdenlive
 that do not use this plugin.

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Ticket URL: <https://trac.macports.org/ticket/39505#comment:2>
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