3G

All you want to know about 3G

3GP is a multimedia container format defined by the Third Generation Partnership Project (3GPP) for use on 3G mobile phones but can also be played on some 2G and 4G phones.

3GP
Filename extension	`.3gp .3g2`
Internet media type	`video/3gpp audio/3gpp`
Type of format	media container

Technical details

3GP is a simplified version of the MPEG-4 Part 14 (MP4) container format, designed to decrease storage and bandwidth requirements in order to accommodate mobile phones. It stores video streams as MPEG-4 Part 2 or H.263 or MPEG-4 Part 10 (AVC/H.264), and audio streams as AMR-NB, AMR-WB, AMR-WB+, AAC-LC or HE-AAC. A 3GP file is always big-endian, storing and transferring the most significant bytes first. It also contains descriptions of image sizes and bitrate. There are two different standards for this format:

3GPP (for GSM-based Phones, may have filename extension .3gp)
3GPP2 (for CDMA-based Phones, may have filename extension .3g2)

Both are based on MPEG-4 and H.263 video, and AAC or AMR audio.

When transferred to a computer, 3GP movies can be viewed on Linux, Mac, and Windows platforms with programs such as MPlayer, VLC media player, RealPlayer, QuickTime, GOM Player and Media Player Classic.

Hardware support

Most 3G capable mobile phones support the playback and recording of video in 3GP format (memory, maximum filesize for playback and recording, and resolution limits exist and vary).
Some newer/higher-end phones without 3G capabilities may also playback and record in this format (again, with said limitations).
In iMovie '08, a movie exported using the "Tiny" setting is saved as a .3gp file and can be played on a Mac, an iPhone (as well as any other handset able to load and play the file), an iPod touch or using Apple's .Mac Web Gallery service.
Audio imported from CD onto a PlayStation 3 will copy onto USB devices in the 3GP format.

External links

3GPP codec specifications

v • d • e

Multimedia compression formats

Video compression

ISO/IEC	MJPEG · Motion JPEG 2000 · MPEG-1 · MPEG-2 · MPEG-4 ASP · MPEG-4/AVC

ITU-T	H.120 · H.261 · H.262 · H.263 · H.264

Others	AMV · AVS · Bink · Dirac · Indeo · Pixlet · RealVideo · RTVideo · SheerVideo · Smacker · Snow · Theora · VC-1 · VP6 · VP7 · WMV

Audio compression

ISO/IEC	MPEG-1 Layer III (MP3) · MPEG-1 Layer II · MPEG-1 Layer I · AAC · HE-AAC

ITU-T	G.711 · G.719 · G.722 · G.722.1 · G.722.2 · G.723 · G.723.1 · G.726 · G.728 · G.729 · G.729.1 · G.729a

Others	AC3 · AMR · Apple Lossless · ATRAC · FLAC · iLBC · Monkey's Audio · μ-law · Musepack · Nellymoser · OptimFROG · RealAudio · RTAudio · SHN · Siren · Speex · Vorbis · WavPack · WMA · TAK

Image compression

ISO/IEC/ITU-T	JPEG · JPEG 2000 · lossless JPEG · JBIG · JBIG2 · PNG · WBMP

Others	BMP · GIF · ICER · ILBM · PCX · PGF · TGA · TIFF · JPEG XR / HD Photo

Media containers

General	3GP · ASF · AVI · Bink · DMF · DPX · FLV · Matroska · MP4 · MXF · NUT · Ogg · Ogg Media · QuickTime · RealMedia · Smacker · RIFF · VOB

Audio only	AIFF · AU · WAV