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

This article includes a list of general references, but it lacks sufficient corresponding inline citations. (September 2017)

3G2 (3GPP2 file format) is a multimedia container format defined by the 3GPP2 for 3G CDMA2000 multimedia services. It is very similar to the 3GP file format but consumes less space & bandwidth, and has some extensions and limitations in comparison to 3GP.

3GP is defined in the ETSI 3GPP technical specification.^[1] 3GP is a required file format for video and associated speech/audio media types and timed text in ETSI 3GPP technical specifications for IP Multimedia Subsystem (IMS), Multimedia Messaging Service (MMS), Multimedia Broadcast/Multicast Service (MBMS) and Transparent end-to-end Packet-switched Streaming Service (PSS).^[3][4][5][6]

3G2 is defined in the 3GPP2 technical specification.^[2]

The factual accuracy of parts of this article (those related to 3GP codec list (see release 12 of 2016 p.65)) may be compromised due to out-of-date information. The reason given is: 3GP has expanded codec lists while 3G2 has stagnated. (February 2021)

The 3GP and 3G2 file formats are both structurally based on the ISO base media file format defined in ISO/IEC 14496-12 – MPEG-4 Part 12,^[8][9][10] but older versions of the 3GP file format did not use some of its features.^[7] 3GP and 3G2 are container formats similar to MPEG-4 Part 14 (MP4), which is also based on MPEG-4 Part 12. The 3GP and 3G2 file format were designed to decrease storage and bandwidth requirements to accommodate mobile phones. They are good for lower end smartphones for faster streaming & download.

3GP and 3G2 are similar standards, but with some differences:

• 3GPP file format was designed for GSM-based phones and may have the filename extension .3gp
• 3GPP2 file format was designed for CDMA-based phones and may have the filename extension .3g2

Some cell phones use the .mp4 extension for 3GP video.

• 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). ^{[citation needed]}
• Some newer/higher-end phones without 3G capabilities may also playback and record in this format (again, with said limitations). ^{[citation needed]}
• Audio imported from CD onto a PlayStation 3 when it is set to encode to the MPEG-4 AAC format copies onto USB devices in the 3GP format. ^{[citation needed]}
• The Nintendo 3DS used 3GP technology to play YouTube videos.
• Apple iDevices used to support files for playback only as passthrough files, hence no editing ability, but since iOS 9 this has been deprecated meaning files of this format have to be manually converted to H.264. ^{[citation needed]}

When transferred to a computer, 3GP movies can be viewed on Microsoft Windows, Apple macOS, and the various Linux-based operating systems; on the former two with Windows Media Player^[13] and Apple QuickTime^[14] respectively (their built-in media players), and on all three with VLC media player.^[15] Programs such as Media Player Classic, K-Multimedia Player, Totem, RealPlayer, MPlayer, and GOM Player can also be used.

3GP and 3G2 files can be encoded and decoded with open source software FFmpeg.^[16]

• Comparison of (audio/video) container formats
• SIF (Source Input Format)
• CIF (Common Intermediate Format)