Recently, I have bought a video converter called Domino Video Converter Pro. It is a user-friendly and powerful product for both novices and pros. It allows you to quickly convert among almost all popular video formats including AVI, MPEG, WMV, FLV,MTS, MP4, MKV, HD Videos, 3GP, DivX, XviD, MOV, ASF, MOD, H264. You can also convert video files to MP3, WAV,AC3, AAC, M4A,etc, popular audio formats. Both of the output video and audio files are with outstanding quality.

You can download Domino Video Converter Pro at their official website: http://www.dominoconverter.com/video-converter-pro.html