If there was no picture capture or camera switch after application start, then
state_proc.configuration is uninitialized. If video capture is started
in this case, then segmentation fault happens.
Thread 8 "megapixels-pr" received signal SIGSEGV, Segmentation fault.
1085 if (state_proc.configuration->make != NULL &&
(gdb) p state_proc.configuration
$1 = (libmegapixels_devconfig *) 0x0
state.configuration is set in update_state(), but set only after
init_controls(). After update_process_pipeline() is
called from init_controls() pipeline_change flag is reset and changes
after init_controls() (including state.configuration) are not applied to
state_proc. Removing update_process_pipeline from init_controls()
makes all settings to be applied at the end of update_state().
init_controls() is called only from update_state().
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