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MP4 file format

MP4; digital format for storing video and audio / From Wikipedia, the free encyclopedia

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

Quick facts: Filename extension, Internet media type,...
MP-4 Part 14
MPEG-4 Part 14 extends over ISO Base Media File Format (MPEG-4 Part 12).[1]
Filename extension
.mp4, .m4a, .m4p, .m4b, .m4r and .m4v[Note 1]
Internet media type
Type codempg4
Developed byInternational Organization for Standardization
International Electrotechnical Commission
Initial releaseOctober 2001; 21 years ago (2001-10)
Latest release
ISO/IEC 14496-14:2020
January 2020; 3 years ago (2020-01)
Type of formatContainer format
Container forAudio, video and text
Extended fromQuickTime File Format and MPEG-4 Part 12
StandardISO/IEC 14496-14
Open format?Yes
Free format?No[2]

Portable media players are sometimes advertised as "MP4 players", although some are simply MP3 players that also play AMV video or some other video format, and do not necessarily play the MPEG-4 Part 14 format.