Standard: MPEG-B
Part: 12

Examples of variants

Editions

Edition - 1: Support for sample variants in the ISO Base Media File Format

Publication Year: 0
Status: published
Motivations:
Objectives:

Edition - 1: ISO/IEC DIS 23001-12

Publication Year: 0
Status: published
Motivations:
Objectives:

Edition - 2: ISO/IEC 23001-12:201x [Edition 1] Support for sample variants in the ISO Base Media File Format

Publication Year: 0
Status: released
Motivations: To support use case where ISOBMFF files/segments carry sample data with more than one encryption schemes.
Objectives: In the use case, CENC ``cbcs``and ``cens`` encryption schemes are used. These two schemes use subsample pattern based encryption of the video streams. In this use case every sample in the main track there is an associated sample variant data (only encrypted blocks) in the sample variant track. The sample variant may have the same KID as the main track samples. It may have different KID than the main track. The encryption schemes are different between samples from the main track and samples from the sample variant tracks.

Whitepapers

Publication date	Title
2017-07-24	Whitepaper for Sample Variants in the ISO base media format