I tried burning the DVD with the ffmpeg option that you recommended and it seemed to work fine, The CPU capacity was at a 97% though but managed to complete a small DVD. The problem was that it does not work in my DVD player, but works fine on the computer. Does the DVD player have to have an mpeg codec built in it to recognize the DVD file? Maybe it's dated by now.
Also the DVD I used was a DVD-R - I don't know if that makes any difference. Thanks for you help!