Originally Posted by
djr33
Google "flv to ogv converter".
However, be warned that it won't be easy to find a program for free. You might find one, but flv is hard to work with and not supported by most programs so your choices will be limited. And OGG is VERY rarely supported overall. You might be able to convert to a middle format then get it to ogv.
This isn't yet a good option, really. Use flash or an embedded plugin like quicktime until the standards of HTML5 are worked out and you can actually use this with one format. For now it's just asking for trouble, I think. (Of course I think it's a great idea if there is finally a cross-browser way to play video/audio, but it's not yet ready so we must wait a little longer.)