Can I convert .h264 videos to .mts format.
Converting H.264 Encoded Video Files directly to AVCHD Videos (.h264 to .mts conversion) should be possible and quite straightforward.
Use one of several video editing programs or (online) conversion tools, such as the Freemake Video Converter or MediaCoder, which allow users to import H264 videos and re-save them in MTS format.
One of the most popular and successful free video conversion softwares
A free universal media transcoder for Windows