a-one 3gp video converter is the most powerful 3gp video converter software. it automatically converts almost all formats of video files that are already on your computer such as divx , xvid , avi , wmv , mpg, mpeg , asf , mov , asx , svcd , vcd stream formats into 3gp format.key features: (1)convert various video file formats to mp4 for 3gp. (2)conversion speed is 3 times of the playback speed. (3)super easy to use: as simple as a few clicks. (4)batch files conversion. (5)custom define the output audio volume. (6)support almost all digital video files (avi, mpg, mpeg, asf, wmv, mov, swf,etc.) into an 3gp-ready format. (7)user-friendly interface : without any complicated settings. (8)hardware auto-detect: automatically detect your hardware and decide the best converting speed. (9)preview display: you can see the converting progress in preview window