ISO Base Media File Format
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Revision as of 04:25, 11 November 2014
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 "ftyp" box, which contains a list of "brands" that give information about the specific file format. See the 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 "ftyp" box and an "moov" box. (We're not aware of any other standard formats that meet these conditions.)
Specifications
- ISO Publicly Available Standards → "ISO/IEC 14496-12..."
- ISO Publicly Available Standards → "ISO/IEC 15444-12..."
