QuickTime Player's merge function increases file size as of MacOS15 - does it re-render? It never used to!
QuickTime Player offers a feature "Add Clip to End". This used to work instantly, without rendering afresh. As of MacOS15 the merged file suddenly takes a long time to save, and its size is about 4-5 times as large as it should be (and used to be).
There's plenty of video editing software around that can merge files in this way - the reason I used QuickTime Player was precisely that I could carry on with a file of managable size. It would be a shame if this feature was dropped!
Or is there a way of doing it the old way still?
MacBook Air 15″, macOS 15.0