The WTV format is a format by Microsoft and used for recording TV content in Windows Media Center. It can contain MPEG-2 or MPEG-4 as video codec and multiple audio codecs.
MXF is a video format which contains captured audio and video data as well as metadata that describes the media stored in the file. It has been designed to address a number of problems with non-professional formats. Moreover the MXF files are able to streamline workflows between different platforms, such as cameras, digital editing equipment and servers.