Have you tried the Container Switcher Application from floh yet?Ok the first option using the Clipgrab and rewrap was working well until I dragged the .mts file into the rewrap unzipped file and then it creates the .mkv file within 1-2 seconds but the .mkv doesn't contain anything, it's zero kb.
I'm not sure what is going on, can you help me with this too please?
Thanks again mate
If that does not work, create or find a small sample video from your camera and upload it as a compressed ZIP and provide the link in order to find out what is wrong, since you should not get an .MKV but an .M4V file, and that .M4V file should be similar in size to the .MTS.