When I select the filter 'stabilize' and hit 'analyze', a window opens asking me to "select a file to store analysis results". Where am I expected to store this? Why can't Shotcut store the information in the project file or choose a temporary file itself?
Just go ahead and save the *.stab file to wherever you like, give it a single letter name and save it to the desktop to make it easy to delete once you're done with the project.
Okay but I'd like to make the feature request that Shotcut handles these itself without user involvement.
It is one file by clip, right?If you do an error and overwrite, it will mees up the other file, right?
Correct. Try not to shoot yourself in the foot.
Today, Shotcut provides no file management whatsoever. When the day comes that you can set a project folder then Shotcut will start doing what you suggest.