MP4
From Just Solve the File Format Problem
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* [http://xhelmboyx.tripod.com/formats/mp4-layout.txt mp4-layout.txt] | * [http://xhelmboyx.tripod.com/formats/mp4-layout.txt mp4-layout.txt] | ||
* [http://www.mp4ra.org/ MP4 Registration Authority] | * [http://www.mp4ra.org/ MP4 Registration Authority] | ||
| + | * [http://www.ftyps.com/ Complete List of all known MP4 / QuickTime 'ftyp' designations] | ||
[[Category:Audio and Music]] | [[Category:Audio and Music]] | ||
[[Category:MPEG-4]] | [[Category:MPEG-4]] | ||
Revision as of 21:53, 31 December 2015
MP4 usually refers to the multimedia file format defined in Part 14 (and to a lesser extent Part 1) of the MPEG-4 standard.
"MP4" could also mean the entire MPEG-4 standard, or some other subset of MPEG-4. This article only covers the Part 14 file format.
MPEG-4 Part 14 is an application of Part 12. The recommended extension for it is ".mp4", though ".m4a" is often used for audio-only files. It is standardized by ISO/IEC 14496-14.
Imgur uses an MP4 video format for converting animated GIFs uploaded by users into its own "GIFV" format, which is actually an MPR referenced in a video element of an HTML 5 document, which is served with a .gifv extension from their servers.
Contents |
See also
- AVC (file format), for the related format defined in MPEG-4 Part 15
- ISO Base Media File Format
- AAC
Specifications
- ISO/IEC 14496-14:2003 (MP4 file format) (not free to download)
