After I tried some ways to convert FLV to DVD or SWF to DVD, finally I found my way to convert Flash: FLV/SWF to DVD which seems good to use.

Part Two: How to convert FLV to DVD or SWF to DVD in an easy way
Download FlashOnTV（http://www.flash-on-tv.com/flash-to-dvd.html) which is a special software I found to convert FLV to DVD or SWF to DVD.
It is a professional Flash to DVD converter which has more powerful functions, it allows you to create DVD menu and save project or do more edit.

Step 1 Run FlashOnTV, add Flash (SWF or FLV) files.


Step 2 Preprocess Flash files.
Some SWF videos need to preprocess before burn to DVD, it can automatically process.

Step 3 Creat DVD menu.
This FlashOnTV allows you to DVD menu: menu, frame, button, text and custom thumbnail, background image, background music.


Step 4 Burn DVD.
At last you can burn Flash: FLV/SWF to DVD with DVD disk, DVD Folder and ISO file.
Note: All the files could be saved as FLV project.

After all, if you like a professional flash to DVD software which allows you do many own edit on DVD menu, you can try FlashOnTV.