how can i convert 3gp files into mpeg (video) or dat format?

Answer 1

http://media-convert.com/

Answer 2

Avex DVD to Mobile Video Suite is an All-in-One solution to create Mobile Phone 3GP movies from DVDs, TV shows and downloaded videos. The software combines DVD to 3GP Converter and 3GP Video Converter in one package for discounted price. The software is easy to use. It features superb video & audio quality and the fastest conversion techniques availabe on the market (Up to 3x faster).
1.It creates Mobile Phone 3GP movies from DVDs, TV shows and downloaded videos.
2.It features superb video & audio quality and the fastest conversion techniques availabe on the market (Up to 3x faster).
3.It's easy to understand, clear and intuitive user interface makes it very easy to use.
4.Finished and wrong files are cleaned automatically.
5.Without any adware or spyware.
6.The software combines DVD to 3GP Converter and 3GP Video Converter in one package for discounted price.
7.Configuration from last run is saved and auto loads on start-up.
8.Avex DVD to Mobile Video Suite is an All-in-One solution.
9.The software is easy to use.
http://ripper.mostshareware.org/avex-dvd-to-mobile-video-suite.html