Step 1: Free download FLV to DVD Converter and install it.
The interface is like the following:

Step 2: Input DVD disk to DVD-Rom .
Step 3: Launch DVD to FLV Converter, Check DVD disc..

Step 5: CLick
button to add FLV video to be converted.

Step 5: Under DVD Recorder Choice, choose the First option.
button.
Then Click the Make button to start convert FLV to DVD

Note: if you want to Rip DVD to FLV in order to share it with your net friends: please reffer to : Guide: how to Rip DVD to FLV