Riva FLV Encoder
Full user review
"Didn't work -- using xp SP3 for avi to flv conversion"
Free. But download link from CNET led to an inoperable website. Found program on another website.
Didn't work. Never stopped once started. Generated huge flv file, which had the same 3 seconds of video repeated over and over again.
I uninstalled it with Revo Uninstaller and I'm still looking for a converter.