Media Profiles Clause Samples

Media Profiles. ‌ The Common File Format defines all of the general requirements and constraints for a conformant file. In addition, the annexes of this document define specific Media Profiles. These profiles normatively define distinct subsets of the elementary stream formats that may be stored within a DECE CFF Container in order to ensure interoperability with certain classes of devices. These restrictions include mandatory and optional codecs, picture format restrictions, AVC Profile and AVC level restrictions, among others. Over time, additional Media Profiles may be added in order to support new features, formats and capabilities. In general, each Media Profile defines the maximum set of tools and performance parameters content may use and still comply with the profile. However, compliant content may use less than the maximum limits, unless otherwise specified. This makes it possible for a device that decodes a higher profile of content to also be able to decode files that conform to lower profiles, though the reverse is not necessarily true. Files compliant with the Media Profiles have minimum requirements, such as including required audio and video tracks using specified codecs, as well as required metadata to identify the content. The CFF is extensible so that additional tracks using other codecs, and additional metadata are allowed in conformant Media Profile files. Several optional audio elementary streams are defined in this specification to improve interoperability when these optional tracks are used. Compliant devices are expected to gracefully ignore metadata and format options they do not support.