here is the software from which u can convert any type of video to any format basicaly for avi and dvd formats.
Film Machine – A Professional Web Design, Photo and Film Studio. All In One AVI,MP4,MKV to DVD/(S)VCD conversion utility. Supports DVD subtitles(both permanent and selectable). NTSC to PAL and PAL to NTSC conversion. It also supports standalone encoders like CinemaCraft Encoder SP and Canopus Procoder.
u can download this software from the link given below