How to convert .3gp files to .h264 format.
Converting 3GPP Multimedia Files directly to H.264 Encoded Video Files (.3gp to .h264 conversion) is certainly possible and quite straightforward.
Use one of several currently available video editing programs or converters, such as FFmpeg or Freemake Video Converter.
Alternatively, you can try some online conversion tools, which allow users to easily convert .3gp to .h264.
A video converting tool
A free video converter for Mac & PC
Program for multimedia streaming and conversion
All-in-one package of DVDVideoSoft utilities and converters
One of the most popular and successful free video conversion softwares
A universal all-purpose free media, audio & video converter
A digital video converter for Windows