I have just released a small utility – this one can join to mpeg4 files into one
Supports MP4 and M4V files. Files must be the same encoder settings , and it will seemlessly join them with no reencoding – its fast and simple, only a few minutes for a couple of hours total files.
Download, unzip, run the exe. point to the first file, the second file, choose a save file name and his go …thats it.
NOTE – THIS WILL NOT KEEP ANY METADATA YOU HAVE ADDED TO THE FILES BEFORE JOINING THEM – YOU WILL NEED TO RE-ADD METADATA OF REQUIRED.