Introduction
3GP or .3gp is the third generation video standard. It integrates mp3, mp4, 3gpp, 3g3p and 3g2.

3GP is a multimedia container format defined by 3GPP for use on 3G mobile phones. It is a simplified version of MPEG-4 Part 14 (MP4). 3GP files have the filename extension .3gp or .3g2.

3GP stores video streams as MPEG-4 or H.263, and audio streams as AMR-NB or AAC-LC formats. 3GP files are always big-endian. 3GP also describes image sizes and bandwidth, so content is correctly sized for mobile display screens.

3GP files are viewable on a PC using QuickTime or RealPlayer.

MPEG-4 Part 14, formally, ISO/IEC 14496-14:2003, is a multimedia container format standard specified as a part of MPEG-4. It is most-commonly used to store digital audio and digital video streams, especially those defined by MPEG, but also can be used to store other data such as subtitles and still images. Like most modern container formats, MPEG-4 Part 14 allows streaming over the Internet. The official filename extension for MPEG-4 Part 14 files is .mp4, thus the container format is often refered to simply as MP4.

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