I prefer Nidesoft Video Converter. It is an excellent video converter with powerful functions. Download and install it here: http://www.nidesoft.com/downloads/video-converter.exe
and get more information here: http://www.nidesoft.com/video-converter.html

It surpass other video converters for its unique features:
〉Convert between all popular video and audio formats including AVI, MPEG, WMV, MPEG1/2/4, 3GP, MP4, DVD, VCD, SVCD, MOV, MP3,etc.
〉Convert FLV format (such as youtube, Google Video, Yahoo Video, Myspace Video) to iPod, support video crop mode setting and various output resolutions.
〉Customize output file: setting Video Bitrate, Audio Bitrate, Video Size and Volume.           
〉The Video Converter allows preview; Allows you to select target subtitle or chapter.
〉You could keep the default settings or set parameters of the video and audio codes by yourself.
〉Easy and simple to use for beginners.
〉Very fast converting speed and excellent video quality;
〉So easy to use that only a few clicks are enough; Codes are all built-in;
〉Optimized for Processor (SSE2/SSE/MMX/3DNow!) and Graphics Card Acceleration. The new version provides more friendly interface and better quality.
〉Fully optimized for Dual Core, Hyper-Thread processor.
〉Up to 4x faster than other software. Provide >400% converting speed, beyond your imagination;
〉Free Update!!! Very good Day Email Service.