Step 1: Free download vob to flv Converter and install it.
Step 2: Open this vob to flv converter suite Pro:

Step 3: Click
button to input vob files , batch vob to flv supported.
Step 4: under Profile selection: click download arrow, Choose: FLV video format (*.flv)
.
under output Folder , Click "Change" button to select the destination folder you want the converted 3GP to store. (the default folder is stored under file: c:\outputFolder\)

Step 5: Click
convert button to start convert vob to flv.
Then the Converting vob to flv process shall be looked like this

After successful converting vob to flv, the converted FLV files shall be stored on the folder you have previously selected.
With this powerful vob to flv converter, not only can convert vob to flv . you can also convert FLV to almost all other popular video formats. but all the process is the same, Just Free download and enjoy it.