I use ImTOO 3GP Video Converter, it's good
This is a discussion on 3gp to AVI within the Nexus One Audio / Video forums, part of the Nexus One category; I u se ImTOO 3GP Video Converter, it's good...
You should looking for a professional converter , I met the same problems like you , and I ask my friend, he told me a website . there are all kinds of converters . but I forgot it , I will ask him again and then I will told you .
Digital Media Converter is a free audio and video software that converts media from most formats. No adware, and completely virus free. Supports almost any file format and it is a fast converter. It also does batch conversion and perfectly keeps your audio and video in sync.
Last edited by cali; 07-27-2015 at 11:40 AM. Reason: Removed Embedded Link