From mediAvatar Software Studio:
mediAvatar FLV Converter is not only a FLV to video converter to convert FLV files to other video files like AVI, MPEG, WMV, DivX, XviD, MP4 and MOV, but also a video to FLV converter to convert other video formats to FLV file. Moreover, you can convert audio file to audio-only FLV video.
1. Adopts multi-thread encoding technology which promotes the converting speed of High Definition videos.
2. Metadata support for MP4 and M4A formats.