1.Download Mkvtoolnix,Mkvextractgui2 & Mp4box (command line tool) 2.use Mkvextracthui2 to extract the video,audio,subs. 3.put the Mp4box to folder C:\Windows 4.use mp4box to mux the tracks to mp4 container or u could use MP4muxer. read more about mp4box: http://gpac.wp.institut-telecom.fr/mp4box/mp4box-documentation/