Why does shotcut stops?

[shotcut]

Try the different options in Settings > Display Method

Display Method

This setting is only available on Windows and Linux. Shotcut uses OpenGL technology to draw its user interface and display video. OpenGL is typically implemented in the GPU of your computer and its driver in the operating system. These two pieces (Shotcut and the UI library it uses) and the OpenGL implementation need to communicate using a complex protocol. Sometimes, they do not communicate well and have compatibility or interoperability problems. Thus, there are some workarounds: use only s…

However, bear in mind that the Software option is broken in version 19.12.31. You can try the Software option in the version 20.02 BETA or a previous version if both OpenGL and DirectX are both not working.