Nero 8 recode

Has anyone had the experience of using Nero 8 Recode, selecting “Recode DVDs and Videos” to Nero Digital, and clicking on “Import Title,” the program goes on and on “Analyzing.?” I let it analyze for over an hour, but nothing happens. I am doing this to an mp4 movie file. Does anyone know what is happening and what I can do differently?

Your codecs are probably broken. Re-initialize codecs with your favorite codec-pack, like CCCP or K-Lite.