With Filestar you can easily convert WMV to MTS. Accessible directly in your right click menu for single or batch WMV processing. How to convert WMV to MTS:
1. Download and install the latest version of Filestar. (https://filestar.com)
2. Right click on one or more WMV file(s) on your desktop and select Convert with Filestar.
Type "convert mts" in the search box.
3. Press Run.