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. a b c d Popp, Harald; Hjerde, Morten (November 9, 1996), MPEG-FAQ: multimedia compression [2/9], faqs.org, archived from the original on January 4, 2017 , retrieved 2016-11-11

ISO/IEC 14496-2:2004– Information technology— Coding of audio-visual objects— Part 2: Visual". ISO . Retrieved 2017-08-30. ISO/IEC 14496-14:2003/Amd 1:2010– Handling of MPEG-4 audio enhancement layers". ISO . Retrieved 2017-08-30. The Apple iPhone uses MPEG-4 audio for its ringtones but uses the .m4r extension rather than the .m4a extension. a b MPEG. "MPEG standards – Full list of standards developed or under development". chiariglione.org. Archived from the original on 2010-04-20 . Retrieved 2009-10-31. MPEG Industry Forum (MPEGIF) MPEG-4 White Paper at the Library of Congress Web Archives(archived 2010-01-08)If a video drastically changes from one frame to the next (such as a cut), it is more efficient to encode it as an I-frame. The first meeting under the current structure was held in October 2020. It (and all other MPEG meetings starting in April 2020) was held virtually by teleconference due to the COVID-19 pandemic. [14] Cooperation with other groups [ edit ] MPEG-2 [ edit ]

ISO/IEC 14496-10:2014/Amd 3:2016– Constrained Additional supplemental enhancement information". ISO . Retrieved 2017-08-30. ISO/IEC 14496-22 Information technology— Coding of audio-visual objects— Part 22: Open Font Format" (Zip) (firsted.). 2007-03-15 . Retrieved 2010-01-28. Mobile phones use 3GP [ when?], an implementation of MPEG-4 Part 12 (a.k.a. MPEG-4/JPEG2000 ISO Base Media file format), similar to MP4. It uses .3gp and .3g2 extensions. These files also store non-MPEG-4 data ( H.263, AMR, TX3G). In practice, most (if not all) low end phones and feature phones record in this format, as most (if not all) other mobile phones and smartphones record MP4 files using the .mp4 file extension, and some high end phones [ which?] can record in .raw. Elementary Streams (ES) are the raw bitstreams of MPEG-1 audio and video encoded data (output from an encoder). These files can be distributed on their own, such as is the case with MP3 files. The MPEG-1 standard is published as ISO/ IEC 11172, titled Information technology—Coding of moving pictures and associated audio for digital storage media at up to about 1.5 Mbit/s.

MPEG-21 (2001): Multimedia framework (MPEG-21). (ISO/IEC 21000) MPEG describes this standard as a multimedia framework and provides for intellectual property management and protection. 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.