ffmpeg is really great. Does work great for now. Just need some more understanding of all the parameters. Some hit and miss trials will give me more ideas.
For right now, I downloaded ffmpeg svn, as Ubuntu's ffmpeg didn't have amr support, which is needed for 3gp.
For 3 gp support, have a look at
*www.rezsoft.org/3gp/ - it has a nice script.
and this thread *lists.mplayerhq.hu/pipermail/ffmpeg-user/2006-July/003509.html
Another link that helped me *vardhman.blogspot.com/2005/05/video-encoding-from-frames-in-linux.html
BTW, JGuru, Xamoz can't be found.