I've had success converting AVI or MKV files to FLV using the Free FLV Converter available at http://icoolsoft.com/flv-converter/
Hope this works for you!
ryan650 Reviewed by ryan650 on . Encoding qestion - converting avi to flv Guys I need to convert videos from avi and mkv to flv, can you suggest me good app ? :sun: Rating: 5