WTV file format
This format was created for videos recorded by Windows Media Center in which the video is encoded by h.264, MPEG-4 or MPEG-2 and audio by Dolby Digital AC-3 pr MPEG-1 Layer II. WTV files can take text, audio, video, and other data. It took over from DVR-MS which was the older version of the Windows program. WTV however supports DRM that allows owners to protect their contents.
This Windows Recorded TV Show is an audio and video file container used for the storage of TV programs recorded by the Windows Media Center. However, the Windows Recorded TV Show files can only be played on selected media players such as Nero 12, Windows Media Center, and a couple of other media players.