View source for ISO Base Media File Format

{{FormatInfo
|formattype=electronic
|subcat=Metaformats
|locfdd={{LoCFDD|fdd000079}}
}}
'''ISO Base Media File Format''' (occasionally abbreviated ''BMFF'') is a metaformat for "time-based" media formats (mainly audio and video). It is based on the more-general metaformat we're calling [[boxes/atoms format]].

It is defined by Part 12 of the [[MPEG-4]] standard, and also by Part 12 of the [[JPEG 2000]] standard.

Files always have an "<code>ftyp</code>" box, which contains a list of "brands" that give information about the specific file format.  See the [[Boxes/atoms format#Brands|boxes/atoms]] article for more about brands.

Much of the format was copied from [[QuickTime]] format, though not all QuickTime files use ISO Base Media File Format.

Among the formats based on it are [[MJ2]] and [[MP4]].

== Identification ==
Files use [[boxes/atoms format]], and have both an "<code>ftyp</code>" box and an "<code>moov</code>" box. (We're not aware of any other standard formats that meet these conditions.)

== Specifications ==
* [http://standards.iso.org/ittf/PubliclyAvailableStandards/index.html ISO Publicly Available Standards] → "ISO/IEC 14496-12..."
* [http://standards.iso.org/ittf/PubliclyAvailableStandards/index.html ISO Publicly Available Standards] → "ISO/IEC 15444-12..."

== Links ==
* [[Wikipedia:ISO base media file format|Wikipedia article]]

[[Category:MPEG-4]]
[[Category:JPEG 2000]]
[[Category:Video]]
[[Category:Audio and Music]]