How do I reduce the size of an flv file?

U can try Moyea flash video mx pro.Flash Video MX Pro is the professional conversion tool to convert video to FLV(Flash video) and Adobe Flash (SWF) ready for the web or to be shared across the Internet connections. This program will generate FLV files with personalized control bars and settings to make the online sharing easier and simpler. It supports almost all types of video formats such as DVD to FLV, flash video downloader MPEG to FLV, AVI to FLV, MPG to FLV, WMV to FLV, RM to FLV, RMVB to FLV, MOV to FLV, ASF to FLV, MP4 to FLV, 3GP to FLV, etc. Meanwhile it can generate Flash movie (SWF) as the FLV player embedded in an HTML page for easier sharing and promotion.