NNN Free WMV to MJPEG, as its name, is free and can be used to convert WMV to MJPEG. It is a good program for you if you want to convert WMV to MJPEG accidently. It can convert at superfast speed and the converting result is relatively good. The interface is really simple, so it's easy-to-use. You can master it even without any help. It is a professional WMV to MJPEG converter. Just try it.