How to convert several VOB file to one AVI file?

Do you know what is VOB file?
VOB is Movie data file from a DVD disc, typically stored in the VIDEO_TS folder, Some other files that you will also see in the folder are IFO and BUP. The IFO files are the information files containing meta data about the DVD and instructions for the DVD player on how to handle the disc. The BUP file is simply a backup copy of IFO files. It contains the majority of data stored on the disc including video, audio, and subtitles; usually formatted as an MPEG-2 system stream and can be opened by various video playback programs.

Although a vob file is also an MPEG file, it has additional data that a standard MPEG decoder will not understand, e.g., the private data, which only a DVD decoder will understand. Those data include information about the file offsets and time duration of all chapters included in the VOB file.

A player of generic MPEG-2 files can usually play unencrypted VOB files, which contain MPEG-1 Audio Layer II audio. Other audio compression formats such as AC-3 or DTS are less widely supported.
MPlayer, VLC media player, GOM player, Media Player Classic and more platform-specific players like ALLPlayer play VOB files.

"Hi, after ripping the content out of a dvd, i get these .vob files along with a few others. I can play the .vob files through vlc but i rather watch in windows media player and converted to .avi. So my first question is: what is the best way to covert the video content of the dvd into 1 single .avi file."

To slove this problem, a video converter will be easily achieve it. Doremisoft video converter can help to convert VOB to AVI, You can learn the detail bellow:

First, Get the doremisoft video converter, install it to your computer, then run it by double click, then click "Add File" button to import your .VOB file into the converter.

Then, Set AVI as the output format. You just click the drop-down list of "Profile", you will find the AVI file on "Common Video".

Tip: To convert several video clips to one video, you can select "Merge all files" on the left bottom.

Finally, Start to convert VOB to AVI. When you are satisfied with all the settings above, you can then hit the big "Start" button to begin converting VOB to AVI.

Related reading:
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Sony NEX-VG30 produces footages in 1080 50p/60p AVCHD file format. To import nex-vg30 to imovie, you can get an AVCHD video converter from Doremisoft.