The original slim woman speaking on the flv is framed by vertical black space on the left and vertical black space on right side of the video. When it's converted to wmv or avi, the vertical black sides are gone and the video is widened to fill the player, and the subject is now very wide. How can I keep the original way it appears when I convert it? Thanks.
For converting flv to avi, wmv, etc. Personally, I use AVS video converter. Its a commercial solution and cost about $39 US dollars, but its been well worth it. And, you can convert the video to all types of formats and not just FLV without losing original video quality. if you need, you can have a try too.