Hello and thanks for your replies!
A list of media files included in the project I can already extract from the .mlt file, searching for “resource” properties. But I would actually need the opposite, all files which are not in the tracks so I can delete them.
A question for my personal understanding: What is the purpose of the playlist? As I can add media to the tracks without adding it to the playlist, it doesn’t serve as a media manager.
Another potential use case: If I want to extract several sequences from one clip and move them to the timeline I can already apply some filters to them in the playlist and then copy the clip several times to the timeline and all copies will have the same filters applied. But in case I later change the filters on the clip in the playlist, the derived sequences in the timeline are not automatically updated, therefore I see only limited use in the playlist to maintain the same filters on a bunch of elements in the timeline.
Therefore my question: What is purpose of the playlist?