Quicktime file format5/7/2023 ![]() May be in the primary file (contained in one or more boxes), or can be in secondary files, referred to by means of URLs. The media data (e.g., the unstructured essence for tracks and segments of audio and video) is referred to by this metadata. Placement and timing of the media, is contained in structured boxes. All the structural metadata, including that defining the ![]() ![]() The summary of the physical organization of an ISO BMFF file below draws on Annex A and on An Overview of the ISO Base Media File Format, a presentation from 2018. Annex B provides Guidelines on deriving from this specification. The file format is designed to be independent of any particular network protocol while enabling efficient support for them in general.Īnnex A of the 5th edition of the specification (2015) is an informative Overview and Introduction for the format. ![]() The file structure is object-oriented a file can be decomposed into constituent objects very simply, and the structure of the objects inferred directly from their type. This presentation may be 'local' to the system containing the presentation or may be via a network or other stream delivery mechanism. To paraphrase from the Introduction in the specification, ISO_BMFF is a base format for media file formats, designed primarily to contain time-based audio-visual information in a flexible, extensible format that facilitates interchange, management, editing, and presentation of the media. The ISO Base Media File Format, referred to in this description as ISO_BMFF, is an international standard, developed and maintained under the auspices of ISO/IEC JTC1 SC29. Information technology - Coding of audio-visual objects - Part 12: ISO Base Media File Format (formal name).
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |