||★ ★ ★ ★ ☆ Common
The ".mts" extension stands for MPEG Transport Stream, but refers to a high-definition format called AVCHD. It is based on the MPEG-2 transport stream and supports 720p and 1080i resolutions.
The AVCHD format is used by Sony, Panasonic, and other HD camcorders to record high-definition content. It is recognized by most modern high-definition video editing programs.
Microsoft Windows Media Player
GRETECH GOM Player
VideoLAN VLC media player
||April 14, 2009
Information from the PC File Extensions Reference