Okay, if you are technically inclined, try this opensource freeware to convert your m2ts file to avi files.
Here is the link, http://www.olmosconsulting.com/hdr-sr1/
and here is a lengthly explanation on how to go about doing it,
http://www.fsckin.com/2008/01/03/transcoding-mtsm2ts-avchd-video-files-with-free-software/
