Hi Eric
The reason you are dropping frames after 30 mins or 2 gig file is due to
the way you import the files. Do not just grab mts files from folder as you are missing vital information! Copy the whole folder. On Mac I go
to File and select duplicate. Then take whole folder into editing.
By doing this you will find the file is seamless you don’t need to join it!! No Glitches 🙂
Hope this helps
Rog