In addition to Duplicate Warning in Playlist there might be something else to improve.
Use case: Have a playlist-only project and check if you have used all files out of a folder.
By activating this function, Shotcut would check, if all files in the folder are in the playlist. All the others are listed in a popup and there is the possibility to mark the ones which are not yet there and “add them to the playlist”.
- Easier approach: use always the project folder
- More sophisticated approach: let the user select a folder (so several ones could be checked one after the other)