If you are looking to convert mts files to mpeg4 so that it can be convenience for every one to edit them.
Ofcourse, there were so many paid softwares for doing this job. But, what is more interesting is that we can achieve that without paying a single penny. Yes, at free of cost, using a free software.
MTS to MP4 Converter:
The MTS to MP4 Converter provides the best solution to convert MTS to MP4 with perfect quality and fast conversion speed.
From the below website you can download it for free and get more information.