How to convert video between all video formats:

Step 1. Download AVS Video Converter

http://www.avsmedia.com/download/dvs/avsvideotools.exe


Step 2. Launch AVS Video Converter

Start > All Programs > AVS Media > AVS Video Tools > AVS Video Converter
Step 3. Select Output File Type

Click the To AVI or To DVD or To MP4 or To 3GP or To MOV or To WMV or To RM or To SWF button along the top of the interface.
Step 4. Choose Video File or DVD

Click the uppermost Browse button on the right. Navigate to the location where you keep your video files or DVDs, and select the video that you would like to convert. Click Open.

Note: When your input is a DVD Disc, you will need to select the path to your source file: X://Video_TS/Video_TS.IFO. "X" stands for your DVD-ROM or the hard disk drive folder where your DVD is stored.

It is important to select the IFO file, rather than VOB or VRO file, because the IFO file contains the information about the entire DVD structure and this way you will avoid audio and video de-synch problems when converting.Also, most DVDs have several VOB or VRO files (files with actual video) and if you convert VOBs or VROs instead of IFO, you will have to merge them afterwards, which is not the case with the IFO files.

Anyway if you have only VRO or VOB files, select them. AVS Video Converter converts these files perfectly too.
Step 5. Select the Output Location

Click the bottom Browse button on the right. Choose the location where you would like to save your converted video file. Click Save.
Step 6. Select the Output Format Profile

In the list of Profiles select one of the available profiles or click Edit Profile button to manually set the output video profile parameters.
Step 7. Convert Video

Click Convert Now and step away from the computer (processor performance will be seriously affected during conversion). If you want to watch the progress while you convert, click the Advanced button until the viewing screen pops out of the bottom.