There is only one file type that uses the .MJP extension:
MJPEG Video File
Motion JPEG video format that stores video frames using .JPG compression; used by LG cell phones to capture and store video; saved in a proprietary format that is not supported my most video playback programs.
|Apple QuickTime Player||Freeware|
|MJP Converter (MJP11.rar)|
|MJP Player and ADP Converter (mobile01_adp_mjp.exe)|
Updated: July 30, 2012