Skip to content

Latest commit

 

History

History
37 lines (22 loc) · 1.58 KB

0007-use-timerange-in-flow-segments.md

File metadata and controls

37 lines (22 loc) · 1.58 KB
Raw
status
accepted

Use Timerange in Flow Segments

Context and Problem Statement

The timerange of the media samples represented by the Flow Segment can either be represented as a timerange (currently range, but will be renamed to timerange) or a combination of first_ts, last_ts and exclusive_last_ts.

The original design used a first_ts and last_ts because the timeranges were required to be inclusive to support Flows with or without a media rate using the same representation. The internal implementation also used the first_ts as a sort key.

The design was later changed to provide a choice between representations and to allow Flows with a media rate to use an exclusive timerange end. A timerange with an exclusive end makes it easier to check for containment of a sample within the timerange given that audio and video samples for example have a duration.

Considered Options

  • Option 1: Allow either representation to be used
  • Option 2: Only support the timerange representation

Decision Outcome

Chosen option: Option 2: Only support the timerange representation, because it simplifies the API by removing duplication.

Implementation

Implemented by #27

Pros and Cons of the Options

Option 1: Allow either representation to be used

  • Bad, because 2 representations for the timerange needs to be supported in the Flow Segment

Option 2: Only support the timerange representation

  • Good, because only 1 representation for the timerange needs to be supported in the Flow Segment