244656 Compress .flv files

Hello - I have 4 .flv files that are too big. They are between 40-80 megs. I need someone who knows how to compress these to a much smaller file WITH OUT loosing it's quality. The quality is the most important part due to it's education the video provides. If you can convert my .flv up to 50% with out loosing quality please bid and let's work together. Thanks