Share 3gp video files as mpeg Is there a relatively easy way to convert 3gp files to share as mpeg format from an Android device?
No, probably not easily. This SO answer points to using FFmpeg via the command line. It offers examples on Audio and Video conversion. For example:

ffmpeg -i /tmp/a.3gp /tmp/a.mp3


This Android Shell Command app is on the market, which could theoretically call FFmpeg, but it looks sketchy weighing in at only 2.5 stars. Could be worth a try but it's tough to tell.