I have a copy of a movie in avi format. its around 712 MB can't fit into a CD-R so i have to burn it in DVD-R. im a newbie when it comes to video encoding, ripping, burning, etc. I have Nero Ultra Edition 6. Please help me. Thanks!
NEVER use Nero for movies' encoding. Use any tutorial in http://www.afterdawn.com/guides/ . You'll avoid wasting plenty of DVD-R, saving much time.
My personal suggestion:
NEVER make a 4,5 DVD movie from a 700 MB AVI. A general rule in movies encoding is: garbage in = garbage out, and you cannot expect a huge quality by making a 4.5 GB movie from a 0.7 GB movie. If you make a (S)VCD movie from that AVI and author a DVD containing multiple (S)VCD movies, the result will be the same, you'll make it faster, and you'll be able to fit 4-8 movies into a DVD!
Read http://www.afterdawn.com/guides/archive/multiple_svcd_on_dvdr.cfm for multiple SVCD movies and http://www.afterdawn.com/guides/archive/vcd_to_dvd-r.cfm for multiple VCD movies. Avoid AVI --> DVD conversions, and believe me, please.