Have they released the hi-fi tier they promised years ago?

Between Tidal’s high quality streaming and my Jellyfin server with FLAC of my CDs, I’m happy.

Here’s a task for you: how do you convert a folder with 5000 images from png to jpg, while ensuring that they are scaled to at most 1024x768 and have a semi transparent watermark on them?

I know how to do it quickly using the command line, but have no idea how to do it with a GUI.