Hello motherbrown,
The conversion time depends on whether the movie is protected or not, because if the movie you are trying to convert is protected, then
Tunebite will do the conversion in real time.
Concerning the problem you have with burning:
Tunebite does not support DVD burning, it has the CD burning wizard, which helps burning only CD's.
If you would like to burn your converted movie on CD, you'll have to do the following:
1. See that both of your CD-ROM devices are installed correctly and have the latest windows drivers for each of them.
2. Please see also whether you use Virtual devices which some Burning tools would create like
Nero, Deamon tools, etc
3. If one of your CD-RW devices are set as default for your system , please see that CDWizard of Tunebite will use the same device
Good luck!