Doremisoft video converter can help to convert most of video format to common video format, like mov, mp4, avi, wmv, 3gp, mkv, flv, mpg, DV, etc. It also can extract audio from your video, so you can play it on your portable devices. It has the ability to edit video, like cropping, spliting, merging. You can add effect, watermark to video, adjust audio volume and fade in/fade out effect.
If you have MTS/M2TS file, you can convert them to the video format you want. Now you can see the video guide:
How to convert MTS to DV on mac with easy
How to convert m2ts to mov for imovie, final cut pro
How to convert M2TS files to FLV on Mac OS X