Package: openshot-qt Version: 1:2.4.4-dmo4 Severity: grave When you edit a project with many clips, the cache is not freed properly. This causes a number of problems, including complete freeze of the computer when exporting the project to a file because the RAM gets used up (and the swap space too).
The issue is describe well here: https://github.com/OpenShot/openshot-qt/issues/2237 Apparently, the bug was fixed upstream over a year ago and version 2.5.1 should be ok.