Converting .ogv to .flv

I used GTK-recordMyDesktop to record step by step guide. The new recordMyDesktop produce .ogv as the output of the recording session. I tried to convert it to .flv using ffmpeg to the outcome is unusable. Finally, I use combination of mencoder and ffmpeg:-

mencoder -oac mp3lame -ovc lavc input.ogv -o middle.avi
ffmpeg -i middle.avi output.flv

This does what I want.