Moo0 FFmpeg is a custom Windows build of FFmpeg, an excellent command-line video conversion tool more known in Linux world. Using this tool, you can convert most kinds of video / audio files into others, including FLV and other video formats using XviD / x264 codec. Here is the sample list of formats / codecs it currently supports. Sample Formats / Codecs: - Video Format: AVI, FLV, M4V, MKV, MOV, MP4, MPG, OGG, OGV, RM, SWF, TP, TS, WEBM, WMV and many more. - Video Codec: H.263, H.264 (x264), Mpeg2, Mpeg4 (DivX, XviD and its own), RV10, Theora, VP8, WMV (v7, v8) and many more. - Audio Format / Codec: 3G2, 3GP, AAC, AC3, ADPCM, AIFF, AMR (NB, WB), AU, FLAC, GSM, M4A, MP3, MP4, OGG, PCM, RA, VORBIS, WAVE, WMA and many more. Additionally, this package adds some extra enhancements to increase the usability for Windows users. Yet, you may possibly get lost in using unfamiliar command-line operations at first; however, please keep on trying a while. It gets very easy once you get used to it.